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 0xe2837f3a0392960b42f2ef6fca8f335a35999f1162fecd69c40f9914d181c40d. 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/1a87f593-47bf-4f5f-b0dc-22a529d150aa.json and https://artists.proofprofile.net/proofs/artist/1a87f593-47bf-4f5f-b0dc-22a529d150aa.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 0xcfb786774c970109440ffca13aea69f10c1cab4493b97fc8f308edbb95c07ec6. 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/QM4TW2095918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe603b273f79ade255a2753b6fa99f8e5bfa9792afb12d664d1cb93f1ee7c4481. 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/QMFME2091935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d6fd89f313e38b3b761036c48891943b4ac6fa8ff55e6ea75348e659201c8b. 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/QMBZ92260389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d95b82b7ffe46fd4056bb5a8cef8dd52c7d7cb8b431b9e0b2e5275a37aff152. 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/QMDA62113854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b36064c6484466442ac974982bb7502383bfd08c7766713bac24bf8754892ab. 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/ES71G2101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb006b8880dc9d054d077b505048723e149277ee07853865e22a57e8fcc5d81ed. 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/QMBZ92080639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1997cbe55d04747775bb3e4677c09b7f6899da65a3a2fb0d96c535ac7a94f. 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/QMBZ92001355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a967230c686bcb514270aa58805eabfacbde3ff45201b2b5c33847809820bd. 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/QM6N22097412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215e472ce548ec260f7ed7a3b2097bb21ee45f00faa27a1ae3948741ccea6b5. 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/QM4TX2090060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb697e62927d8237950ec1d75f02941a45c86b9647cb8d23de5798a064e2afc37. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ES71G1928886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488e300612c05b24f9bc78ac2ebae1dfd2fcf3df40af3a7dabcb65eadae981ea. 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/ES71G1922137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad10babe4a54efe20de94a7f388d0a2ed70429a9ce711a9c2d5d844141438b. 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/ES71G1918000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcc7c92c8ac011368d977ae89e5ded0d6f341ac8c6ac8ec3c362b82ac953ee7. 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/ES71G1902963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7349fe5bb3d97cc9410fef5301b0abe7648ad739f6496557fb13ddf1c9fce29c. 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/ES71G1923523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d2ba2c8a7a80e48eff67529b5c77fc08aa7863d2580f99fd03fd3b7b66de7. 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/ES71G1905120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099514b0c3a2cdf633e4a815bffba72e460baad159e4d902a687bdec5f2cfb9. 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/ES71G1940112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dd6eb723f69c7ac53e3ca2cdb71a3b72cf1f6568803792714e21edfeb5318d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMFME1968729.