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 0xfb3581fc378afbe2354aa8dbb37bf03e9c20ebee36e603e913ad2401e74d534b. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd95578b-35c8-424e-baf0-76439318165c.json and https://artists.proofprofile.net/proofs/artist/fd95578b-35c8-424e-baf0-76439318165c.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 0xc59c9db6606904c40d0d13dda2ddb5e25c85ef0818f202cf35898dde703ee4fa. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBSMU8757543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39dd4148633dbbf3c4fe5bbbf85fc4f8a355fa7a473f8f52b88f441756ab40f. 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/GBSMU8757544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233b7363201450ec805f86d8944e0fb3ca76157479390220a8bab814e43c06d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBSMU8757546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db1fd1b30c190042f858f58a09d0846213a4559a9cbc484088366a66fd4a88f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU8757547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df7538305a023e31fb0e3ebebc1720422463beefbf56c56bb284d3065383e6c. 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/GBSMU8757548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7665e4f5d6d34ac7f8beeb8e305bb8ec7ccd32cd9eb2e7c02a8042bcce67191. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBSMU8757551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc20c8c1f775172a31f95d8683a086559d729c0fab4ae4595f6ebc3c335e6d3. 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/GBSMU8757552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fadcefcf65ad46fe8f7ab5587176d3e78a4c1ab3f5932a9e8703f1e2d97b117. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBSMU8757648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc725d86bfae20ca2261da35fceff73fec1605d2d5c1bf0a0319d8785ab212c65. 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/GBSMU8757649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c639eabbe52365892898d7f8de2a1a27e507ae519c31b583e5e65ae344191f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU8757650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab3a78540dcf90ee672cddf4a6a66ded9a393749e1f3cd6e378ac858b344aae. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBSMU8757651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe409c33405c97273e86b48182d12810db9e7f0576f59509689fb5c91efe8df2. 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/GBSMU8757652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e86648bde020c410f32a88713c30c74c4ecf8ae189981cfc67c341449ba4e8. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBSMU8757655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1ccfc88b18bf6f7b8e96eed511affb88567ac17cff1855f2a0540befe0aa0a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBSMU8757656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4da7753a1c965a31e9db1809df764176663ab754b798252ddba1923bdd985b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBSMU8757657.