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 0x4bf2d66babcc0a5bfeaa7f6c1e4fa166ee84cc710f81e66b93f79b1aafff0394. 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/f79a3ad9-55af-4637-8863-35f99e20fa17.json and https://artists.proofprofile.net/proofs/artist/f79a3ad9-55af-4637-8863-35f99e20fa17.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 0xe86996784170c32ee78437b1ce5aa9c04c47e5ea990bcafa15e40894b9712ad1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBSMU2430341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e19e80c5fee9e949aea4e07a0d7d7e7918ee0ff919de95ccd7c5d3ec313b41. 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/GBSMU2430342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a933a9def3826461e323f97adaa02b555d6d3010f48d7d585aee71db03999f6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBSMU2430343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7bee8661fdf4f96cafea3f9e410b86a02f84deb1168d6065319be114f0d44. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/GBSMU2360031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf479183f7f481ce7e4a950fb9bd764daaf00f0b05ed1a3360bad84449bd89d4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU2360033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29a36e7e8f5c3b50725fdad0f5e3de410af08e844b1391d85717c22100b0aa4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU2891202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764ed71f44977806209976b58df88eb2120e0e50867959ecbe821128d082d863. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU2891206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10fa9825f3fdb6c4a47f630990ff0ac0f481b60e82a7ffb01e5ed53c7f90768. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6F2032606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d138db030c538209e45ef4be6990c29924fbb42c158e27406b82229d17066e. 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/QZK6F2032610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a62985a8e24a0e2556afa1961f8e8221901be7b757e251cf40dab70911004fc. 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/QZK6J2030209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b071466781a9d4c3644d3922ad431b6a6a7925383fcdda4a3fbf5ef4a758acf. 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/QZK6F2032612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7a193b3d69782ba959868adb8552b38d463db80ae1336718831f6414553fa3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GX8LD2227548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736e4223c86ae2d70463cd2ecf216c6963d94d9ce6cd0b3380e33a4125722c4d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GX5MX2320672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434a4b13b70cc07139e1c241fea949912ff95f08eb2c1145bcaf1813acb1b47. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX5MX2302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd98b81e078d54b8e97b58ad43da0231f3960445f0d7dc46e85febee948edff3. 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/GX5MX2356674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa057d28c218e81157290165d132b298d3c6bd32097d5941b04baaad68c49113f. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/GX5MX2345747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4faff5a011f9125af1c5fd73834339cdef4c584b56a79f3611b8161bf697ddf. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GX5MX2358836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab035c082e4f4163f62f6436853e128c7de55635d770a1e808ee109b0d799a. 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/GXBDT2379340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d2e8df7119a83eb200c23e0792035cd85c5751144a71c374a1a6436c2f4cdb. 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/GX4R52467918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3bddaf96aad6e61de6c27266c94959231a7b4e9661db263bc2996a2b01d8a7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GX4R52457352.