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 0x819b6ef1b7713dd1dd86f7f31ea0c61760f9fe27c4743b4a3ef5a74498b3a933. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87bd27db-a47e-4c58-a3ce-745eea355f87.json and https://artists.proofprofile.net/proofs/artist/87bd27db-a47e-4c58-a3ce-745eea355f87.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 0x7229be3cb01b1c3087a63b61cac55b22a9f916974d0b72294ef2479d75841831. 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/QZZ782596436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13378d3ca257090014ffbe5f3bfe5ba91cb1895c150af03b710a0e3caf62e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ782596437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e7209ac8efa4d1ac02b2de343f62b9673c4e283106ee0a264809211eb0e6e1. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ782596438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb311984c44e2bb486164ffe836415579df2b3bf5cb09210f3fbcaf45d5211f7. 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/QZZ782596439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e41ae82066d7c2a30e830a7265061241948660d337ca9be95a1603ae08af15. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:38Z), 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/QZZ782596443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8284f6e4b85deaf3e40701088352e019e8b127b90eadcfe5a05b29b86e51d834. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7N2511292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872b745b3fbc6d8ce3e019339584b0e9f3a32a39187fc3a4cbc6063c4c3cd87f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7W2521144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4deadaeee1dde2dbc411fd830d04167132922a901d182b3fe6baa6e73360f0. 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/QT3EY2527546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5ac23b271226d34b467c8fab87712666b8deb4af4cf66436ac16a9d08f578b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:27Z), 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/QT3EY2527547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8cddbd63a4b833faef0b950079cebb8631777091a41c9d8a854fc6f3944979. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:57Z), 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/QT3EY2527548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8da037da7cc6ea6941a445ef764f90083996e64ebec6d375f3218d7173ea8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EY2527549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f6c2b621620bcc96c486e293ecc65b00bb1a329d17c3fadece8e26df6445fa. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EY2527550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a7bcc6912dce0ce642a19651a34abf2d2eb404cdfe5a09760394bcdaabf49. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EY2527551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff556c6f048c304b6e3723c997485c7499b470400e0868ef7e92b2e056ff6be. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3EY2527552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e16cabc5a75fc1dc9369494f6911640161f291d1d9552d8e24776dea51f7e82. 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/QT3EY2527553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c1c1cf4fb8cbca6a73a60b3d3667c365743754823eee919a1c6990004dea18. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:52Z), 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/QT3EY2527554.