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 0xe62edde6ea09f44d302107f97fa51020ed19f93aeda76d8a76141b88ae1832f6. 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/3a8af6c7-f7d1-4482-abad-cf901fa27ad7.json and https://artists.proofprofile.net/proofs/artist/3a8af6c7-f7d1-4482-abad-cf901fa27ad7.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 0x8dd4b2de79a3ce54d70573da177164cff457c78cd3c8b9563ce2358e3967a7d0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DKE5G2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc86dea31874a1a5301e34f3e2ef2227e091453569116805b7448f8c6492b4f4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DKE5G2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24378c8608d19787de74467988c27a239d1e7013e6ee85689c61069d93183226. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DKY302301901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f626819922f34d3581e0a0145ff0e4c97c881c2651ab96a4772d952c23b405. 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/DKY302301903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf130bee306f1efb143bc66fe6bfa1f14a57a2f1d2d786fdce2f1a7af041d562. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DKY302401301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f60eef4adff07d3ba26030e188e0eaae82a55c38da93adda85c9b7e9d531e9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DKY302401302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c30fb8e4c1c365da55f82cfc073e0b6e3ce56f80b81108f33ed826a6b55d96. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DKY302401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee64906fbc9fc548d0de2d476859be0ec9850903efff88e3150f195641208dc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DKY302401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83f6848a4685748bf0199e77d793a78d9b71d7848bad46e663a81dc44ed7a8d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DKY302401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48298c3da01ca1d7d458cd4b5dab0db47bb16a06c249fabc562801f668ca29e7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DKY302401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c228bdf6508f240833261aae1f2f2c6a0928f6102d7edefe6cc36e3d6db706. 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/DKY302401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5127284f8928867949b9f3c199bd1242d8c40cb2b4060c0b2d8d792ad539a6d. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/DKY302401308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5731615e12f6043789b213c08d22e6dcd086cad29116a7b54c625e78a7db3503. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKY302401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461275ed6be895da2b3169ef1043e0bff74e6348001757d4dbdaf76863375532. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DKY302401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a6b23cf7ec1be219c2ee459819cc56b01f8508ccbca5323bd90486b54854b1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USANG2411728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aca1e66ce738050f5598e923bbb4cb0b6159b60096e463057d3e5b9728cf28. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USANG2411726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbcab0dd268cfedd73cf7780c773c7bf0bf51c8ee083c66c33255da0bd75328. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USANG2411729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39294cec47c58e80c2755f602c1606056a5b08077f039b1565f0063816803857. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE6XA2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba58596aabef113fa597c653d222a9c4387ac8fac466f9c013c0981a8178bbf3. 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/SE6XA2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3951a832f1ddf54d13d75b3d4337ebf57da3637d4b9ceb54cafb7f3a4c3a0037. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE6XA2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f5514cfcc9cfda3541b8699bd02d5c12df6708cd9aadd6a1ef8d8a15009c9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE6XA2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f646aafd8029564ab01eed77a27a6cfe95532c29275729869e1e46d26ee5f0c. 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/SE6XA2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf864d645d1c0d03ee7ab7cc341dbaf9f3ff65b68094c6b6e74ac3f3aa8730ee9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE6XA2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6e77181fc2689cbb92b1f479773333be5d9bb2ae1596035009e26bfc5d4be7. 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/SE6XA2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84323dcb5c6b33ef69092467afcc522c1929e932f8a5f32f1d4f59ece7ea4882. 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/SE6XA2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19b85380f00bd65004bc5e6bb2b85d25c315b3da31880275fa8e1fad6678fd. 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/SE6XA2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b3e4b73671a1ea3565cde51ad00654d173c8810e3877416f40f1eb180bb8f3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE6XA2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c80cc434a18697bc60b7c6be7158a2b8fd9274ee09643c79241d169c81d24f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SE6XA2300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313247c940bac47447f3242a5186f0037ab99c8d5316e3dfe8143794101a4b8f. 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/SE6XA2300112.