1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a16038f51c3b4e65896cfbb3f6de7a264842255636a983bb73ad79c0065df8. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/120a65a2-e1bf-40f0-98fa-03ac197e830e.json and https://artists.proofprofile.net/proofs/artist/120a65a2-e1bf-40f0-98fa-03ac197e830e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ada86eea63fcbb89bf73744ae3edb4ef6b814d9a19642bfcc95421ab7405c42. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8bdb2131527380cd3c0e0f60c0e409f674f399cb1f44f3b1c7c84454016c9e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854ba594bf39c5d0a69f37c968b62d80fec60c31946a9b7760d9b59687432574. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1635be79e190df6c49a983e6caeb53e1111d31bc0c31a3875331d8619fec239. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2000328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89daf403bbfd119d946081ce0e55c29b3ee6067bc42b7c405f87de33392832d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2e1bb4d6833851a23564600f9871414b968e35d2d967e958592f04a3bf0e85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a099b0a781b88ebf3998696d771755dd04e7f3b4c7ba20cb92f2cb94b647f6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0619d140bf86a6d1206f66e8be9600b2a84f157076ecb5521c655802e27c8aa6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2001983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe0aeaf55d48ae823fb828aa59a4f0cc5dc3dfd3747ec4726121fff8946162b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL2001985.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c090d43e7cf5e74fb0e63b0dad2091d6cc6d3f7c3f0fd4a5814cb4bae09ff8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e4279aac5853e4a4f966a7d33a9ed3bf063afbd684d40885959dee4789bc74. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1601155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ec79b129299f8672e1e4aa8b6d0d5ae948364910e4f95670c28ac5c117f6e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1601157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ec00d3212245aaddbe48f6526a42886f32ac5a8a7253c2a0c25fcbac7d9f58. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU1555984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e27e5365cffb6c57cc4f38b07103e956605b4b02154f0ed27fba89ea74319. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU1555985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe8b8f13bf1b61b4e65062b7102b4cd5466de0232f90a2d2b2a275fbbf8501. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a732d4116d80e5971d10bb09217e8055d545df79797b4268ba8694167ddad06. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e21d85edf938745788ffd6c8eeb60ef7895be84637c363a75c3b4b22a0ebdf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441b4f614df630614e066961d20c645ffbcb13f05de47c6cc3aee22fc46ac2c6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87181e487455a211c1e770571e286b479b6a223dc373e3253d022730cd19ce3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1701937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45288cd38d42be6be1fed006fd7d6554d169322d46aa8cff8554296ac884e7b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1ddcfd772321c8377835b256c47cce44d945847f3f54f395618d7859aef830. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda279e032f889e11ed853c43355863af1ad44a37fe3e2f9f18f81c04643b510e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1800372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8453debaabd3d5c04a9af17fc5953078dab08d8a1a08d66dec24f0fe4e5f73. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec7aee010c8b5b40958575457f49964df4a3b27020d167e16fe14d7d1c613ad. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3019ac6703811973f43cc1b50c9371150db7dd84765120d18c4c014f2edbfde1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd648689c2f69822de88d3d1928336441477f8085f337a5fc0ff6a5fcdd3cbc79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39898512f5029ed2c4d4c93d6340afbb9293e1b0d320ec290688ed651287fe82. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b79be4e68ab2840c001626429ee25ce823efedcb58b58504b32f91befb771a8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f370f2771707cfcbd941b81eb4318668de0eaf591a683d9715b0d0234066cba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1701076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecee4e8b33463343912029492fbf3de107cbf135663888cb65ea8258a1f28077. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1835a883e33027f8f70fa05fb4de1a512dfe20cb2b192ee20800794a0e29c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1701081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce511a15c4b9d4733f302af9947935e25e75afb39456f94f79450a5e8a7cd2cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1701083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d54c3778998bc6486f7306d7250e208ff373634466b3f8db37459bc25f9e0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a6364585aaba31bb0a7034d5c7e310be0156d66326e514e229e62131a99054. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa4d529f5c4b917de4799b7af6bb56dd361273286b5e5383256a9c5fabe8d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14713049dd53d6240d149777af15df039ebe58388f563ef10ed1b1784d30bf9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc14e665eb5eca89a4a33461ca8475d54956d029671d0ec26635a767b48fe4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1801356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27df0f5b7e9c021c5f5bfd088047cb28bbc7718548b96ab70b418b488e846c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1600384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801a2e3920d7b9e48494c0fd1bcb757e2a41271fc7a03a6ded18d8839a27b8a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1600388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc775078d68d20c04257a45ee644c915ca70d715c44afa8a352b04c73d7462d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU1726769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80459c381d23b6f2f323e0fc18d4f21c488ae4414c3036fddc540a1053b4685. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2089141.