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 0xa9597c92d15cf53348641b2a1581a83984fc5422b0206ce34d5b13b28bc25693. 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/53f39394-5807-4e2b-8c48-985f3b22da7a.json and https://artists.proofprofile.net/proofs/artist/53f39394-5807-4e2b-8c48-985f3b22da7a.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 0x9798c2c342b74e342196e578d3a10d26f3f87b3dace5f1dfbb8b80bb41f6f69c. 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/DGA062342548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3907ee09da3ead3f015b3aa0ba7799f895aa50f3fe79d76c193e69bb6ceb71. 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/INS182303434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4405590acec299b6bbb792f8055cf7f57270e74700f8161d3605faa256649. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DGA0R2333696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeddf977bb76157d18664f148bca5e3457802faea9b153ff0ded37b0271ae449. 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/FR2X42452636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9cd96c4b7fccad94dcb7f6222d20ac2d6088b279f2ed14b16dbc22c184656. 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/FRX202403111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7092c080a17a21c7343027a653729980c60bc885be6da5ed0e8ebd537274f6. 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/INS182401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a804542e2f2405c76fa6e87be1bf917f20b7af48f337bb8a1b1ecceecd7a155. 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/INS182401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce91cb65006a18e3ef041edf7a4989ae737106ad97071daf995edafac0000d00. 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/INS182401028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65574cd4e893bdaa1495d929234b7a5721243320b929238e2190146bbac6387. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INS182401029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eadc4ca790257cb0abebe21b04feed1c991a274519b3eaa482fad18141fab4. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/DGA052404739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcafdddd08d14342ed77eb7bc205574d3e006ff7fa8b206ff6063d7d3864551. 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/DGA082464990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692368390583efa1c55bbc989fe8bff56c1d3d1b6082d9979bc19c60f1a70d5b. 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/INS182402460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd06c7e7def4ac37ca0673f62a07083b908dd995a074d05db4c0462dafb6b885. 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/DGA0L2472856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fa95828bca7d2eb99c82e82b41a36775a0c2fd894b72d0ce6c80fa903dae44. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DGA0P2484856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860f137a42f553588eaab706333baa8bdccf1307b2daef5fd6f21c050701f95. 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/INS182500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83514adfdf7c8d3e17aa8a2e5362e283541059a596eb4bb30e9afe6e5f58a4. 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/DGA082381925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420f9c291e9472df06d2b735dbd72be9dbf1639b21e3096ebfebe12e363ae4ef. 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/FRX872342065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb14943e0809daa58ae738523adadcadc246a5cef3e3d5328397dcc929dda162. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR10S2380062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cab2174da37b531066637a7921899e2ecf708812d8b6b2b53a7de32f3fac68. 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/FRX452214198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c54c4b6fa0f4fa32063876d63ce0fbe742c81739fd9909c9cbb88b3e1804b5. 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/FR2X42285347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344ae0314efe8ca7b8ff8784bafc6174a8a69645ea3c2acdc4640887f5c4ddc5. 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/FR2X42285345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a80b21d277fc24d038102728ceb9509642a4579e158eeb604bd643f39469e2. 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/FRS182160492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77433788de08b2a653844d6a21b8b633e86bea44156da39b65fbefe2a4f58dd4. 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/FR59R2343481.