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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08014913c4b9de82964ad12aa087159b544866b11f01de8d80321858da75f3e0. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea0a82e8-9147-43f0-9620-7c9e943ff3be.json and https://artists.proofprofile.net/proofs/artist/ea0a82e8-9147-43f0-9620-7c9e943ff3be.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076fd1f34c80ffd15cdb2fce83472b1dacf08b585c9ff5d9ced757d322db9c35. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FRX202193236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4506a97aaff38c326d387f694880e48ce650f0dba94bec5e7448b70f30a3d9f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FRX872175710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc55a594aa5a40f433adbf2800eced64825f923cbefd0acf4dfb51f5ebd9acb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX762159665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bef17b503f67751b8471a9e639b530d7cc785dfb7f026b0605940bb72fda78. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FRX872130783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817e8c48a23eba578783431f5e01b487e1bf0723b66941edb06d5d2cc3d7c1e2. 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/FRX872175720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d57a88569ee1d2c3dccdf0d1c5a109c2fb47e33f4132f3174c965e42e96d16. 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/SE6XY2567841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579125919a5dc112317684fd1b874969dd87b746bce09ac61c156ec005e2f710. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/SE6XY2567842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7712b03df35f01078d32cf7701eb67e1b108e37becdc474fc6d0d455402372. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/SE6XY2567843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10056c97b554051282f3d41ad8d5dc0ae40ff10747151a0dd61e3ad164bec50a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2567844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4138d809b464744a438e58b8bfaab395934057614781da8cb1619a996a6847b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/SE6XY2567845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3285e557fe7377bcc91a4555a6d530582f5dd2495b187fb52bbebc1f00c797a. 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/SE6XY2567846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6ea0cace81e0453d9b6f0a09dffee6983509e65bf25afa613e12d2e7a28bc5. 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/SE6XY2567847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f7d2fde33aa5f0b55d42ddd9739c35fafc085c259a704fd7806437e944a905. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/SE6XY2567848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ed46ca34c776ea60151c42aa8e6dfeffc5244ad0a90ecee8d6cac921b5b8f0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE6XY2567849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674a4a3d90acd296cc70300464092e0d45a52d21e7f91dc15d18e3c19e65e09. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2561063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa182d39fcc227a3fb5fd780848f7220fcb4509e383c9b76def42f465c30b7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/SE6XY2567850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745d4d892c65dceecd8b972c6a96433424270c113f25712cfa03791a1d35485. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6XY2567851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352f7c9ec6645c0fbf9c514802ef724cddd8f17a2b91637af3fcc5d28d5ba0cc. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/SE6XY2567852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2cc52882c8433762b399bf77296db542e5c01a48d7d2c5121e8580a0439a63. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6XY2567853.