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 0x8bd7d1bc327e2ffc22f117408c408bf6994d0ec9ccddbd12ad48229cd0396ac2. 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/3b97f9b5-ef5b-4dfa-854d-4a9c597c49c3.json and https://artists.proofprofile.net/proofs/artist/3b97f9b5-ef5b-4dfa-854d-4a9c597c49c3.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 0xeb443a53a9ec05da999ccfbf99ca66d246895a0722842e3c63684062b1ab938e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ32158959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d10b3a6fd38160fedf5b0250e60e721c6ba6371a103974255378957dd80c3a4. 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/JMG6N2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ad5401c0f828df81f9b97e6dcd8e2bafce4946944e57f06d2d5a2c3bfa949. 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/JMG6N2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d10b3a6fd38160fedf5b0250e60e721c6ba6371a103974255378957dd80c3a4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/JMG6N2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208feabf0a1d394034a3c256c0b9fbfce239bd6514c7389dd8786078270bcbc6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/JMG6N2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb904c98e463c61ffa7b46fb29ca2e1310353c671421743c3ad8d0f745ed44153. 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/JMG6N2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fdef47e5fde5280f8e7fb2c23b761e637f85a70e2d993c30eabdab77d289d4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JMG6N2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65e92229189d97f5b500fa6f755c05ff0f6511adfcedd9e59b8acd7a8b6a1e4. 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/JMG6N2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0d7c9338f698eb215bba765ec840c14c03bd90f7903f422a030b6398d3a397. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JMG6N2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fdef47e5fde5280f8e7fb2c23b761e637f85a70e2d993c30eabdab77d289d4. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/JMG6N2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0803ae56b22542983c97176e9b1b8a6e749b241f78c5df302c5fa0618d05a0. 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/QZTRX2296252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4f904a8311cbe3cf8758e9ebd000fa3c5ca26b14ea058f9ef87ff5f95cbdd7. 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/GBWUL2222021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0ec61a376b4968c08ea958b66b5c4b2da93e4cd77f70ee1c28ca91799b1ded. 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/USRC12203319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56dcf8a54ff11808cb551f229f6c081ec5faa7c15b9472eff5708ca3c5242a0. 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/USLZJ2068652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56dcf8a54ff11808cb551f229f6c081ec5faa7c15b9472eff5708ca3c5242a0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USLZJ2068652.