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 0x168159bcd6858b78993251634ed6c889cdc5f5860b99409a89625f622784cb1d. 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/ed81896c-92eb-4c5a-a8e5-20c269c0c663.json and https://artists.proofprofile.net/proofs/artist/ed81896c-92eb-4c5a-a8e5-20c269c0c663.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 0x9e8b66e946b042a3d395be8da0d5b5c4594090fb477375455878c94c413e48ee. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCADR1886490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a117eb03c4940fb93d2a5a74a4642b3a53f6536e1c42d2a30a687d30aa146bc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCADR1886517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4db00659cd6df32901abe1c59598b41de7c8aba0d824698a57be8c028c4a0d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/TCADR1886522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b68f53d53fcc1f2f9ffdc7e3bcb3daf448c55151ea0978a75ed4f3c68a8255. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCADR1886526.
Fellaga (Extrait de la compile Cercle Fermé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c68f7c047f762d66dc58d247ef4b1fd461ad560cc8b1e45ab3f30b662b85a. 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/FRX282145528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a864c9730890f7ec430b755827477b2241b9faf806a5ed1ebb711140375bc04. 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/FRX452196835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f914783da0a04ac6e34f925c95d599ffacda8776a489440624322ecc1aef2b0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX452196836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6200f5755e400904ec2113e353ca2dec317d922d5a5f66eb9688d5718c7e2b. 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/FRX452196837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e42286b32cfaaccaea7af8368e98b611b12a214e80d8cb58bcb8369979241. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FRX452196838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ff98a98f270ee26c0aa6c35033e3a2f0dc557e03b6467685465edbb28bdf8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FRX452196839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce2b6822c5483f4b81ae16f496c6daa4d7895ed23d377063470b108bde1c705. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FRX452196840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022fd7fed0fd511015acfbda377f1c4831bfbc67b677865b2280fab94c02581d. 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/FRX452196841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66259888f765136af684a42d945480c410ee8517749f6e1c041c22a23bd2c9e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX452196842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16aaa883c0f0fcb3db9686eda0dda138ed064f6575de6c835e35929399ed6c5. 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/FRX452196843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c68f7c047f762d66dc58d247ef4b1fd461ad560cc8b1e45ab3f30b662b85a. 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/FRX282145528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e42ed0e8f31220b98cfc86b7fbb197caef141144c69f7d3afb7f5be0438a6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX452196844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44724f0045161ddf8e056c6a729a3d8d8d056017a81c7b4ad7a436fa72e73aaf. 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/FRX452196845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9c88e4fecdace928627a8a55db00ed8b08ca84ebb07f9e8b3f9189bb20a5d6. 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/FRX452196846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a50b1713d0af6242dfe340b241671e450c95e34459bd1da6026ecddb9fb47. 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/FRX282197074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20312c35ed4b205a04d069dd494dd129751fb43f8b22e2068d81027a7bc467a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X42370275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39caedf02ef4578008fd72945fa5cd870cbe86447dc6708e2c23ecb306d9dc. 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/FR9W12314690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f2e1519c0a59250ab573e1ef42048365a296624c444e87c93c7e2e4603ddf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762489913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb138a4c6baea369daa13199e007e669213475a3abc07fcf8dce9c8162d73d4ea. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAHN2342118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50972c14d73310c429df904667c6a754ca224569ddd663cb231c85ca83963d34. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCAHN2341831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2643ec7aa72ad4445aa73c4b86ec8aa74a1b4ae38d3de0915f88aa36b6ca03bf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAGF2259773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e3420f46cef847c7175da4bbab012b0b1504a94956742a576a3198085a38e. 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/TCAFL2109802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fd4e6b7100cff1aae85413deedc727589236e1bdfb519db567a852e9628b9. 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/TCAHX2464939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb138a4c6baea369daa13199e007e669213475a3abc07fcf8dce9c8162d73d4ea. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAHN2342118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50972c14d73310c429df904667c6a754ca224569ddd663cb231c85ca83963d34. 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/TCAHN2341831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c229f799473074022bd9558fea48f9d5afc4f76dfc4c7ca7365d986e749470. 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/TCAGQ2289284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b449337541da4c3bb920afdc916e608179437c4bd6db7f4b6eafe801051825c. 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/FR8Y72100449.