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 0xf346987a9180dd1a019dc6303c56ba5513fe57478f49b64e867224e1a3b00a7a. 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/ecc130e7-b7d7-41b7-9938-f0167f43a916.json and https://artists.proofprofile.net/proofs/artist/ecc130e7-b7d7-41b7-9938-f0167f43a916.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 0xc1e057deba0d382135ddbc8200b0d80be7bbc8ab5ce8ac43dd4f21ce936f820b. 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/GBTMZ1300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f1a197f5e5d409781e85cb3d7d6853318d22070f4b0672e4a85ccefd69c8c8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWT2318846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a081178446fa4b58bedac49a17420ae81dc0be05027ed97c49f4debfe87f114. 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/GB8KE1554347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561e1587813312aca87d309428e0778c78a684a678d936060cec52da9d67c90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRD51800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092af306f02acb900f992b523ed206d12dd2745077c90cb7ab872d5cd447b58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRD51600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df3dddfe5595e7570a74b31880782c1ce55f2cf8405b7ad2498e89be8ceb3ac. 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/GBRD51700332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dee2afed2cf3a55b37796c41214f5d5e4e2133548edeae1630d5e00f1b76ab. 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/GBRD51800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15978491dac21fa400ff145e11a3f905247cdcef7fff67515c35dc5d1e98bc1a. 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/GB8KE2154903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb03e7a7a96a596a7c8ad1c406afeb5be9b1aaf19e8c877de3f287bd8e85d79. 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/GBQSE1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ba8edba15ab06257c6bf1ed14ef99486e787279122d427be83738086a82c0. 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/GB8KE1554348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abdc9a65724f52359d0cf82414218e2269515d96502bc5c8a14ba7283c0a4aa. 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/GBRD51800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89acbcadc3135b065dabd307051d83d6d32e7cc785834d3a1e7e42df53e81731. 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/GBRD51800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c54d3b8f7bab573facb5d667e5a384e115ff21c487fc0dfd1e198c6b3a80a8. 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/GB8KE2156829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbd055a9f893bf542697fd18294ee72da8c9283927e8df4ac5601d9d1be37a5. 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/GB8KE2201499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6856ce318c4919b7d2cc9af559adc64eb18ecda78f96d1c7b98d2838b4b9ebc9. 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/GB8KE2201500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9be2e68b450f00edce893630ccf6c95e6fdeaab96112daa64ce948ad2ff357. 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/GBRD51900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e56d47957e5aa23199aebb99309cd6a91572904a7ae1e6570e26b741bfbe13. 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/GBRD51800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec04aaeece88f19268ab5cc3d8476f6cd9c14ed6e4e294d5b908b7ec03e84592. 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/GBLSB1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8493c633a29bb3be79640c466e774636f416e2878aced9c51656b77c02d0fa. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBRD51800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85d6777322381fdda9cb037ae3b64813e319de0fc63382d7b20d34ad0e44c2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBRD52000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c69be6acc8f3bc07e9dc91caf036e1e2433b0e25f84546dfb7cf6280b831c2a. 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/GBQSE1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595dc3ca321985c638a60eb5f4a8c295a9fc2d55e6653c7bb0cd6c52cbaf0457. 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/GBRD51600021.