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 0x77936f3a9eb0a3cb8e03d7e82e4f9cd7182ace54629038dd142868475b2abbba. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c983aaa-adf5-4720-91e0-85b2e395caac.json and https://artists.proofprofile.net/proofs/artist/7c983aaa-adf5-4720-91e0-85b2e395caac.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 0xe1f052ddbe66c8b85121484f70a85d8b6ce49b00b7690eb92ba5e9867f39e8b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INT762200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab81f9c6e59d9a139fcb76b6703892a30f127596bf59a11e2cc081a4b526610. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/INT762200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241660f0fd41766a1955c07854e2030b711618fd065df3ab9d76fef9396383ed. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/INT762200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d657ca27be93ba9522227bf386daf2509b079e9ea4fa7668772de334fd48d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/INT762200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61746a4360eebbf03b50b478d69e67ba2abcca222839a5ee65b3bdaa08ec3120. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INT762200325.
RIP Sidhu Moosewala (Return If Possible)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe260944e18272c5019f41e7057f1f3889674953a94b64fe8a8f2a329aa626c7a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/INT762200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d33649d4479713d6b0e0a8756138055b08a5335c5b6625a6c3c99145fc812d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA062386214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855b44c9de9a22e91c67c329fe6999584c07a219a6b406cbb339c11f25cf60c2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA092493515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365ddb45724da1261f518f72eb3820c9e9683b255fef794f3e4f354eb96f3633. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/INY242517910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d33649d4479713d6b0e0a8756138055b08a5335c5b6625a6c3c99145fc812d. 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/DGA062386214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61746a4360eebbf03b50b478d69e67ba2abcca222839a5ee65b3bdaa08ec3120. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INT762200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731f14bdb3e15347a184660b0490595d3d6a015328c31f5bfb5d20c4a5195bde. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/INY242518505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065070e79a5c1a392fbf63f1e2fa578d5de399621a500e4bcf3b00dbb45cd4e4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7T2502389.