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 0x572b2f36429b32fe2e0d4bb78ebde5a652af94eb806913bf150ccd1e6cd41051. 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/4ea4d32d-2845-4d44-b86f-d8b2a63d8c05.json and https://artists.proofprofile.net/proofs/artist/4ea4d32d-2845-4d44-b86f-d8b2a63d8c05.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 0x46f47edc09b00cf256fb19aae817aeecde92543979873c7d67528c80143ef947. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKPL2012134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd367d0aec8c5d2dc8591dadd5de9296032e38069781973b7c7bb249eb566f7a8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBKPL2027073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17bfd1bc1635ba301db95e9f8ea4be352458ff5abc7bd44bfb8b78d2ac48e23. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:08Z), 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/GBKPL2144874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc16cdda6e677df28d09de182fa2cbed266fbc98a89a3e7a28e33979eee8738. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:38Z), 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/GBKPL2154333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627bc1148339b3a00ac6a7235ef16b3f446d61538e33e63a2a50475bbf90451d. 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/GBKPL2162823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876011968936daff53120120462d487cc7ee3c4a63af1e35cbe04d079e8ea6e7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBKPL2170960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8883ba730c753fd450311425ea5efcb0feeff63611aeaa213f975e3385a8f4e9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:30Z), 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/GBKPL2278019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18401d72f6ac53b420fb303c5c90fed24b13c14462fb7d135fe0e641df1514e7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBKPL2284487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e75c7e1b0fb37726550bde4980032a7aa161f49b4e1b1042b000fd73b7ec2a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBKPL2289088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d3b53e8667b0890f2b31abde7876baeb789a08bd8000187818b76a279e0c4d. 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/GBKPL2203888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91630158c5ed693442b582e20bb518604b5f2981a22e1b0284048e6d2c6b816. 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/GBKPL2213665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4702720bb77865e5ff0d6c2e9efd219613cebac4ca34964d274accdf5ad328c4. 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/QMFME2239523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd2f2b02c4c4bcc56df48afd91539af6348309c896dfccde0bf59e229a8a9e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2315682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723c9fe6ae7bfb2bb1d80636d1ed3aa98b692469d0f592b89854f566085c54e5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:32Z), 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/QZLBC2405117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5f88f073538f2be25782ac4d132dc39453a61b44d57fb51b9b70e2ca18492. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZLBC2507125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fde7a1ea5964a19ddc730a12e827434471f2b414012a37fd1beb5966139d4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZLBC2502881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17107dafee299c64804f4ceb2ef9171ee12357a45e483910df7caa1c66e5d59. 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/QZLBC2506190.