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 0x6ca9470b5c738da9f60f62b1f00fe542c74b03dc337202ec603a4e8bf4179c04. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8212a5c4-0d6f-42a8-88fa-721846dd5ab1.json and https://artists.proofprofile.net/proofs/artist/8212a5c4-0d6f-42a8-88fa-721846dd5ab1.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 0x890c3f26f04da5c53df958cc60827752de55109beed460c5eb44c5292babc9ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITIYI2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce8224b7a3ef259ede874e5ba652d5886f929947d566fc9815487f4de5a226. 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/ITIYI2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb2f5b7869f99c0e0bc36d3706787528e6eaa73aab387e85973e8a406e285fd. 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/TCAHI2329114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffc08ced3ad822fa158e1b4aef09041d1b9ccca4313247b53a6eff3be8b3ac9. 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/ITTL52201443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2256da680d8303a236926f1abe9ea995270bfd36925ab77437fe6cd13403953. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITTL62330371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a798e155a98a3bffbb9a89e1551d08a938696933b2929cedda7a7aa95c564. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITTL62330372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88ced4c3526d5664dd41af355ed2e25c6fcb64c902a7e385f1275ff4e04547. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITTL52301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffc08ced3ad822fa158e1b4aef09041d1b9ccca4313247b53a6eff3be8b3ac9. 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/ITTL52201443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5300bfd39de9075ff570b0d660e3cd3272370e08291ca33e0dd76575824d77. 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/QZNWR2368242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5a4c7f0d028975a3a43134b5ec5068497a8a7bf48695d44322c9eadb099a6. 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/QZNWR2368243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1326e9dc7b7b5ee7b7e6b2b93ae697ad60cdb26cc7f9d8202f05c4132c715080. 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/QZNWR2368244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691fa67f0f86fec8bcdb6ede7fb23c5dbb23d62a306cd24197d6fd8ade924a8c. 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/ITV0G2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9188de5dd8ddfaf38d546915e67b12f27d52c19e8bd1dd24f150e3982159e19. 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/TCAHF2319675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3f0161e2697cb9272cdb37d3a398dbf1ffaec2d25673e26c3c9c73e2066a0. 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/IT7LD2302313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb2f5b7869f99c0e0bc36d3706787528e6eaa73aab387e85973e8a406e285fd. 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/TCAHI2329114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131460afff1fbb6ee2dea3affd3ed3ce99005730a5ba1584db6a6a74d3defba5. 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/IT7LD2400986.