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 0x7de09885017ce5aef0c4a6951c146a78313e0e2a932bdc3de62b33efbdcb0f94. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72bfcb8d-d57d-402c-9822-7d71774a723f.json and https://artists.proofprofile.net/proofs/artist/72bfcb8d-d57d-402c-9822-7d71774a723f.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 0x40eb76663e7f872014213116938b2d2b3ef7fdf5a7613056e31ca6f146214e35. 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/QZES92405973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce6a9a4c8d6be424568f8046d2de39b957357c2eb8920f863f72e511ab90c7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA62442425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0aa90fbf4bac754f4cc8da20d796de61add1c82d5fd1d2be2a7982dac5ea1a. 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/QZES92405974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d71f331d321cbdeef60e5e1e6a161decb71270464971f5bd3eceb875167787. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZES92405969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb11b0a4e439240ef143a0caa179ef7b2e039b9268c4accec35464b20d1d6d7b. 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/QZTBF2303759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d346e2f643df51ad24c686173895d03e7bdbf0f98b768c5a782ea89fe7e18c. 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/QZK6J2316019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce6a9a4c8d6be424568f8046d2de39b957357c2eb8920f863f72e511ab90c7. 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/QZDA62442425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa8b235569068d6f826c2ceb8cf39d806db09932148137c71ca0d406caa703. 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/QZNJX2365400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d346e2f643df51ad24c686173895d03e7bdbf0f98b768c5a782ea89fe7e18c. 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/QZK6J2316019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e74ee98e064b9ec8ed169f13c792642bb002bb104e35868363b824e8f977a3. 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/QZK6Q2075255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe040bcab281042411459e733cd0095b280984379c9231b40d334a73ffaea1a74. 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/QZK6Q2075257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0831c1e9d4baf2da7e7d5a59c6f607beddc98f41f3d4f59621d2a4fd34943c1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6Q2075258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b8df9f0bb33932498eb24a1a0f817915296878aedd9a5758779adbe9d6dc4. 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/QZK6Q2075259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec89c8d9168fdbcc9c3c24851d962ccdfd4359511230284a8bf49f17aee952. 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/QZK6Q2075260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9647b4b424983474d0177271a4214973b816ae8b296f5f109df3efdb0f68d78. 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/QZK6Q2075261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c6a7b9097d4811910433a3ea261a0b6c9b5b4572eb94dbeca88ec64e1eca4. 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/QZWFH2485429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb749baf687fcb72b636baa34a3c2d38bf96c938b44a27362322485e85b21130. 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/QZWFH2485433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde329dc7b5927d94577dbb56d454ff93533aa0550452059c34ee5a0bfa5224d. 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/QZWFH2485438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e0e9c4d75480855b36e24324cf8956161ee5026b27d19d24e16d2d4c0d015. 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/QZWFH2485443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f78a367b75c575298ebd5ecf539a28cb18120011f4d88b598730b52c9ac252. 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/QZWFH2485444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d8148352f54f229a40a4064b4ad9a8b953d6279c5f4386e123ea76f862e568. 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/QZNJZ2303785.