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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730252d6953c29682a61ceb394f52ac4cb148be48477c2814408c6511db6587. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2095953d-c07e-4995-911c-3e7ce1e7cb38.json and https://artists.proofprofile.net/proofs/artist/2095953d-c07e-4995-911c-3e7ce1e7cb38.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf23cf973a149fbc71ccaf41ff7986c23d953dc387eb170cd29ed826ad0216. 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/PTJT11300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2d85aa9ee76a2835eb0c772d1413a9522fd51fffd6ca4857338f268257765c. 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/PTUM71000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46326b2ce0bc693a89a59cd5f9e50d128420193b61ede613eafd39cc9eb71b75. 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/PTUM71000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147fda5197c5515bd6f0e7ad0d717c86ba0ebd5a2107ddfd9ba50c85996fbb43. 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/PTJT11300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5467628e0f06f1d67a6e773f92cb3de4f53e662b494d5ee2ea6eaf6a98d0e5ce. 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/PTUM71000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f463575e87d66cdd2898dce59c491357a01e25f4d7095c34704f2dd4ebac23. 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/PTUM71000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf23cf973a149fbc71ccaf41ff7986c23d953dc387eb170cd29ed826ad0216. 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/PTJT11300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2b2abae0e4a184a1f558773caef66692a2d12662d0e8b3f3ab3cb37804af76. 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/PTJT11300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeecfd00f1bb0f7129683da3182c018ca8dff22e2990f862a2806526b4e71c77. 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/PTUM71000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573fb5d4686d7c2e675533ae185ef48bc8d42005fe57173d4ae9b8e09292af0d. 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/PTJT11300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc848b3da7ec5bc6d809d4c8d5e0dc19768ad9e6619fbb864c97a8e9baae1b019. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PTJT11300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be6b495306f7ce9a7595dd01646e8363238ed05ad888f4425bb392a8b2b12cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PTJT11300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147fda5197c5515bd6f0e7ad0d717c86ba0ebd5a2107ddfd9ba50c85996fbb43. 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/PTJT11300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7dcef299a6f09f79fc7c0b089bd57e4103c0b132ff9296c5699913068c801. 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/PTJT11300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d3d6ed032aab74238d2f232b5435c8bbee86f7905316846eea56a0a628e62d. 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/PTJT12200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a9b7f3dbf42b174e91eb94bdbe4a1fed6fdd7cbcd717b0640f03ff24b507f1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/PTJT11300063.
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