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 0xff0dc7682cd4fd082d4a04e1ff74354677e097471a640c0fb13f50a058eb0671. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be2285eb-c1cb-4080-b6d2-5bfe52199d49.json and https://artists.proofprofile.net/proofs/artist/be2285eb-c1cb-4080-b6d2-5bfe52199d49.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 0xdbda23408cd193f1134dd51d5440a64a3252ca7f965aff411108cbcf5a6d8b2e. 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/SE5BW1300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536c9fdc74c60207366c53e525b5033674dbc02d75bbdf91d63a01f47b11bce8. 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/SE5BW1300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a72abe602490bf950392df8b1287a04c2563fe3ff1d477467db55aea040f659. 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/SE5BW1300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbc35f66454bb87e7ee9e936ade1544e9df67fe245fbc3fba03297b58a08e03. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5BW1300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ae6f8821bc8d3c722b7ab6716a24f12aaa3af5f7878053d2c846b2bdf6127. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5BW1300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281400b4b7c7bff4ae1410266102e8d8ce247f170c2349ae342acb518914d77d. 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/SE5BW1300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f425ed34315dc78edd09ec7f8d1b42a727bff0c49819f3abc41b24d708080. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5BW1300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee3b76c0da6e734c600ecbfaae90b2cf5f1d5d7b496f4f0c497801d6752af4. 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/SE5BW1300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc277a677a53f00c433b136305a3969c65adc5b97e2d4cd06aef7cb783c156b47. 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/SE5BW1300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86edf580e42e3704f334b4adecd26c9e10255cda3848e8fef5748384c66f9b01. 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/SE5BW1300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e0044f074e9e597cf14004248b64c7bd3075451880ad6dbd012f7287ae5a3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE5BW1300301.
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 0x7a46139cfeef9b0b71d50460daa548c1f66ba3148f9357e5b5e116f9469335ea. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SE5BW1300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f148d340cdfa8f941c46fba75ae6c4dcc8b1d7625e3f7b1b51e811cb9a6e338. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5BW1300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227109c1a88f88e9604915579c28eaba77ba47486ed7f0d95edd45261971a1bc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5BW1300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c6c5738ccf44b9c6587dda0c06749f5f1a61bda2a6e3a39f478d0c82ca257d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5BW1300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843a23cd3b75564f3985278a5fac5bfa1acb0555184f670ed48fbd9916ec4932. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5BW1300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38529e9e72f1df8ab319dfe55747b087281ccdf2ebf34cb1404479127260ea9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5BW1300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65099ae74b21c130b70586f405b112a9e1147e5d35b3be152b7901b883e8441e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5BW1300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f2de2af88b3c929d84b6e6cb5636ed13b3b46f962165ed8a3196ce36b64e7. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SE5BW1300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443e8d5a30efcd87fda0ba731f3aeec7369df82da0db15ce68fa37e8fbe0a2fe. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5BW1300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa767e8ac7a760bab88c58e6bf5bb0c31456fe6f392b33a9fa9defdb6b0d59440. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5BW1300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3177758d1c53cfd407e24d77445bc515e6ddef13b135d05b2efd391d2545e737. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE5BW1300340.