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 0xf3ec854c5de18a03808015764eb7410e80a7d1bf688840e297194a298b7cda15. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46cdf64c-ec8a-469e-a02c-1f26f1cdeca7.json and https://artists.proofprofile.net/proofs/artist/46cdf64c-ec8a-469e-a02c-1f26f1cdeca7.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 0x9ea3944d596852023f8a64669fef70e347d40febe655acca98bb6fbdf96513ef. 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/ZA4PM2100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356724690b8866e6e840f8b8a2a2ddfd63908a87c5188786c8202b154602ab4. 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/ZA4PM2100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42345bd65e2cfd736048e4bbbc8a2a0a2af09448dff0f966f383ca8910e941c3. 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/ZA4PM2100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68741fcf0dee8be9085d59162dccf03cc08e1ce39d8a8f755f654a6405092772. 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/ZA4PM2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268e596430eb421d99c86579e80fab92fef4a2ca548b66fa29fbd71d2535954. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA4PM2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa28ae5f592db24a4e7b53d52e29c0cb8ad73960a83d853da5ed0900260eec95. 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/ZAL8G2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6962f838ae7fae31dcef57db60c8119b70e8e9a5f7d7860ab58c88b433d7b577. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US23A1583336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9ef9002617244a9bf9d3d29e4bc2aa98431e8f934b48b252f6afe4f55490ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA4PM2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75424401de0c4b455f63ee44bcc439523863aca258fd64818c8c0a5c8e9be84d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA4PM2401605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb38dbd2c2db87d92ab3d966eb9ef87f0d77e3efa8852625973280481365a1. 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/ZA4PM2301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17677b3333f223d6a4dd3f90419e9cdeed1cbc08b2cdf293fc9f6c46df1aa70d. 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/ZA4PM2301510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb980354be8f34775d7b857bc2a117da49fb704a36564bfb4b971111b437e974. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ZA4PM2300700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5690f8659f74696a708ef6b27f43bc97fd1517900a4eba04de17edd898b44f5. 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/ZA8802300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb38dbd2c2db87d92ab3d966eb9ef87f0d77e3efa8852625973280481365a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA4PM2301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dadc1cf964d302169998ef9011cdd6061f855aa3db706dab1458301f3e168c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA4PM2301222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dbc03dc5e97cf9cc28c8e0d6bb0023f459f883f79ea936bc170f6d1a59eb4d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZA4PM2301223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca98862055e90aa50d74c6e8f502d0d5e8e28c6d4a524eaa083398579bf961c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZRUP2300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb45f952a50f5d968493cbe91f5d7731a2cffd3aa71b01b378c5c83c0e8289a6. 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/ZA4PM2300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c5ab0f070e147c4fc558291bc0e6cff5db6692db0988fefa06824b8b2a8a64. 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/ZA34K2301244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb980354be8f34775d7b857bc2a117da49fb704a36564bfb4b971111b437e974. 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/ZA4PM2300700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83951cbb5e19501476ece1c539270db78af4cd9febe84942b63ba960008e79a4. 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/ZA4PM2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c576e7f60bf4bac5230047fc70658388f31c3848fbeebb55d618613f322a1. 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/ZA4PM2200533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e581ccdba92864df80d61fb8d52c3cfb593affb31218f84dcd65fc66ac599. 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/ZA4PM2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5a72ed4d44a7b1b67af022c4c047b6ec7a9424c618d5d11fc5f071f8ca610. 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/ZA4PM2200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3944d596852023f8a64669fef70e347d40febe655acca98bb6fbdf96513ef. 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/ZA4PM2100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42345bd65e2cfd736048e4bbbc8a2a0a2af09448dff0f966f383ca8910e941c3. 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/ZA4PM2100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268e596430eb421d99c86579e80fab92fef4a2ca548b66fa29fbd71d2535954. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA4PM2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af69d4ef72a8dc153a364a9f7c163c7a4b11b43b940c286c6ca69eeafcafd54. 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/ZA4PM2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9bcdd2efbf9f6dda968c7d7b3c842a638ac6df4050c4536f02d788e3f8dea4. 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/ZA4PM2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68741fcf0dee8be9085d59162dccf03cc08e1ce39d8a8f755f654a6405092772. 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/ZA4PM2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31acb77c04893f0c54807e1be0cf13c1f75c97780d35e55b37b6a9df4db4afc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA4PM2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268e596430eb421d99c86579e80fab92fef4a2ca548b66fa29fbd71d2535954. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA4PM2000100.