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 0x5b5aca3a9329ebd9940ce37977b6750756f515328a75c3e1878a728bfa37e736. 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/3fa6abd6-300a-46da-8b9f-f2c07a7d8a14.json and https://artists.proofprofile.net/proofs/artist/3fa6abd6-300a-46da-8b9f-f2c07a7d8a14.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 0x703db572db7eab37c655ab571d6dce6b22544edaa86607f05a31fd8df21fb258. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:45Z), 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/FRR642101488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446553cece3b9747b415456fdf02729bc9e719dab503f6c29184a2df1b8e1b92. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRR642200514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c7039a0b8b8f66bc299a80482aeba644ecdb29630c2098ba234e20ca3a540. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRR642400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee9153a4dfb117cb5c4c4937a87280ebf59341e9d098caf12aecb045f8ff88. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRR642400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c7039a0b8b8f66bc299a80482aeba644ecdb29630c2098ba234e20ca3a540. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRR642400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee9153a4dfb117cb5c4c4937a87280ebf59341e9d098caf12aecb045f8ff88. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRR642400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36079b0a366b6170505b0f40e71432c8b4907d2be96c576eeb4d4e4c8dba423a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRR642400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc18f61250c4526d34ac4d5ada633982e352ec3ed81235183243dc4d63c0c89. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRR642400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80977b5c52f6bdd0e4348bdfea2fad8cbe38ca43d0508f55bcdd0af6fb2b47. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRR642400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf4b15fe1dfd81e7ed4fbddeedb43b979175a23b011b4e38b00931414bd8064. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:50Z), 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/FRR642400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee05bb52b92869b8c25b7537ed0efa62d68f9bf7e139f88600f3094fcd93bd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRR642400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4780b2c6a848ae49217a978620243442ef4c45c4a0eb89435a06b69ac31427. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:42Z), 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/FRR642400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed0ee842a903d91cf6cb72baecb9ad5dcf917bb4a7b1fbb6aaf266765e184f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:54Z), 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/FRR642400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee05bb52b92869b8c25b7537ed0efa62d68f9bf7e139f88600f3094fcd93bd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRR642400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed0ee842a903d91cf6cb72baecb9ad5dcf917bb4a7b1fbb6aaf266765e184f. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:53:11Z), 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/FRR642400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20526af43b3f9b8efc48ead480f9a56f4db3ebbac16bafa0f30f9c5322c04813. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:55Z), 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/FRR642400967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97891e9f9d7b7b500a7e990b79d881b437e8767ffa06bca64901d39471c2a3c2. 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/FRR642400968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20526af43b3f9b8efc48ead480f9a56f4db3ebbac16bafa0f30f9c5322c04813. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRR642400967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97891e9f9d7b7b500a7e990b79d881b437e8767ffa06bca64901d39471c2a3c2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRR642400968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665f864c5c3a62631c2fd03d721a70c782b0f1b696719959d0e75ab194b73fc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:15Z), 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/FRR642401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c3040eba95a55680065c65c94d6c628704ad332cafd21483351e7a8b636158. 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/FRR642401200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665f864c5c3a62631c2fd03d721a70c782b0f1b696719959d0e75ab194b73fc. 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/FRR642401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16513a014ff76adc843e95677c63d05f3420f10bbbcc0b8a495d0dd5ed157a20. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRR642401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d16e8e4d61c42d4d09b17d8c204e4edc1191d8a52d725e38e0c8957e30736b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:57:52Z), 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/FRR642401261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa021155cd94a2c21a2c08895e1161158ff96b410eb4f88cb679eadf3073cf04. 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/FRR642401262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4dfc59bf0366c19ee5cb5c15b83d53c1d41fb348b5c364ab2cdb9da1916cc7. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FRR642401263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf8d61c97015c90477b71fd2d094e8b134287f53ff1d1c1900163634627e554. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRR642401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5074cde80cd92d457b9da4ab542adf8a39982953bc278b2291cd5c4dde5426. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:57Z), 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/FRR642401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbddf261775ed7fb45f3b360ba0c021144705fd3804c0ec6862aac2433aadf09. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRR642401386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf8d61c97015c90477b71fd2d094e8b134287f53ff1d1c1900163634627e554. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:46:59Z), 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/FRR642401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbddf261775ed7fb45f3b360ba0c021144705fd3804c0ec6862aac2433aadf09. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRR642401386.