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 0x86f6b2966457ff0ed5b376768e222c2d24bd2a50b0a4e6f2f7ba8f6b5a19adf2. 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/e117e103-26ba-49ee-9707-14f11c83f85e.json and https://artists.proofprofile.net/proofs/artist/e117e103-26ba-49ee-9707-14f11c83f85e.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 0x82902e400db6963b6d24e785fb2ca349ca7aecdaa1574afa4846165e797b27f1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJE2572720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19d28c8bf317122ff434b055253b0bfbefa622722b6cc2f551207ac2dcfa0de. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:45Z), 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/TCAJE2572732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc084f2c43a099e2b33d6048be44631710dd6c78538fd54288211b1045a3638cd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAJE2572748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf411c8cc52560232d9ef61541e195ac352de5d48a2e85bdf16d9cb39f0970. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:28:12Z), 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/TCAJE2572754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657381cc7adc51f375bcda5097b099eb6bb1e775e4ca55db28f52e01bcd83022. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJE2572763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f78ffc51e1cf82a3ec2e0cfa76de89ed560a6c779400ee16ff1ecdd884e30cc. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:51:43Z), 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/TCAJE2572768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50939e804d5c7a690f3a60842b230b0bc4a99f7f9709bb6b9682cb4b135ff6ee. 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/TCAJE2572777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4097b6ddfafd2e9e7fb367a24a01028ae46bfd15aedbb7d778efeaaac6309e9b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:37Z), 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/TCAJE2572785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec687874bb86071e661e2c98aa53fbc70bfb0c9078f4b234ae9812818dad5d2d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJE2572790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4506422fb2da8f6de0a0a09193d1c88e6ff57dac23d0ef8963f0258a641235. 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/TCAJE2572794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85af512b0fd56a6cef23b9cc9a8898fd9ee8faf197a2af6241226c80eef86ffa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJE2572798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2278bd2ffccc04460f0957b4df688281b7a737935333859606e99316c2f476d8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAJE2572806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a33d9e29081a499a874a740f13ab2c983870de42256ab9b86a14147527b1dd. 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/TCAJE2572812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3149734361d8cfeb59e48cf4c69b53270a5248a7d4c4c4a2fac34ecc8ed4ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJH2528851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3340884220d9505d31ae4e5a2eef47c18f14383107454301e474472ddeabf2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:36Z), 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/TCAJH2528862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b2c0181a05d9d9d642b4c6773d79817d37249874330b8d6ac4de46c529dba. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJH2528885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe308b5f21eae8d02b92cb58294a97f9cea2c7080965e5f5cfbad72d6568b0b42. 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/TCAJH2528891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc237db4d8814745ecebc30c2bb841ce57956594aa619b1a2c1e8674e67eacf4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJH2528910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d993ad9db58f0dcfddd43b9545ae7e3937e6e9a4401d251ffe465b9e42f504e. 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/TCAJH2528931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c17bb65ec31b0d9e0f1cf58fd77bf204f4195410c50c06c19bc08c45237269. 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/TCAJH2528943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5f8cef2b49fc91c9dbe517742f9b69dbcba4aca9d2a2605ea37e2fb6a59a5d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:51Z), 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/TCAJH2528957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f8d9465fc5e8a0757001fea04fe8a1d29900f6d1d1cae0a25c489ec09597f0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJH2528967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579362471336b5cd73266a41f62db46492307bbc7cf38be810dc8fea613ee1d6. 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/TCAJH2528980.