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 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 0x14b5a1ba3de92387c3a36ed7c675e9fa79177effbc6bdf0d36ee6421b2c5dd10. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b599780-3d44-4431-8ff8-24af5f453bf6.json and https://artists.proofprofile.net/proofs/artist/8b599780-3d44-4431-8ff8-24af5f453bf6.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 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 0x1e82961214120ab8e54ea5272a105c4a1f00b445e26c9ea25f56521966be8014. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBARL2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2999cf58ec034ac5c80311d1a087210a06edef807631f0f47ba4e23df3633b9e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBARL2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f6d9f306415fe64ab44bbeafc581217a862986dc41f78d1f4d1ea72d535224. 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/GBARL2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82961214120ab8e54ea5272a105c4a1f00b445e26c9ea25f56521966be8014. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBARL2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d1a56baa8f4af9df5757ec2355b4d2d6b7ad66fb33a6819a5976383c1b8244. 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/GBARL2301817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef09bf2df85dfc3b815d99254a412ec45f4e9633751252f8b6dd9bd36fb770a. 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/GBARL2301517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295662178cbeeac0d056dce022e8f6784f1028f24684468eafaa740751896cf6. 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/GBARL2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2746f62bd87824df3b925d7aedb5f828cfefa331e62dab464179cd1c4e65537. 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/GBARL2300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e39bf0d35cb5beb4d4e87a01bd016943040c86c60bae54affbe50171c8b96e. 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/GBARL2201871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc748596c85655dd82d75e603ac78a1df415622eb84c97f112c60a42dd5157585. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBARL2300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39100c8b69ff2b47ee993234a0c9b46a3af3fa7e889a948e23544034d1adf10c. 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/GBARL2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208aed810f0d8344fc9791b803d3e64ad0ecdee12e7ecc9c107b9aed0aa03dd9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBARL2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2746f62bd87824df3b925d7aedb5f828cfefa331e62dab464179cd1c4e65537. 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/GBARL2300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295662178cbeeac0d056dce022e8f6784f1028f24684468eafaa740751896cf6. 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/GBARL2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e39bf0d35cb5beb4d4e87a01bd016943040c86c60bae54affbe50171c8b96e. 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/GBARL2201871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03838d5ee59d4b0aa36891986a764140585d4b7276b7dd4fdfbb9c9962951b0. 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/QZMEQ2049158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965ff4008c5fecf747341b20b956abb90dfce26e926397bb290dc4c8fb2ac9fb. 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/GB8MX2000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c49e43c0033b0c572304b1ac84c4d414f7ad09a3ebf4fd0c4a4d4452170c50b. 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/GB8MX2000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85816e5dd16e2495643839860fc2072f9ddba9f384ee2d9ce0a841ecacd5bc. 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/GB8MX1900822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31057b98e7befb059964c5398bc7f4b1b9b210b8896670d04b131ad5e46f807c. 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/GB8MX2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a2f164f0f78ab766b80b069dac4a47cbc6ecfce0a808466b5061ab6dd5929a. 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/GB8MX2000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168844c03304700785f556bd4a54eabd02505f7f1acc87015cea0019d7a9710c. 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/GB8MX1901065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85816e5dd16e2495643839860fc2072f9ddba9f384ee2d9ce0a841ecacd5bc. 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/GB8MX1900822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e85d93d83c3157c5332dd5b8bbc38210a4125f8a5fa344a6d99e601acb8b50. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1940717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7954e7161aded75ba91d30992326d84628cfbfd0b95ea03c1a5b69fb42fbfd. 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/IEPNW1800011.