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 0xd0957b19d42be78e4bf6413f44fef2fda8c75169ca21c16b87be4f2a89982e80. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3441f28-ea7f-4053-97fb-c93e05141141.json and https://artists.proofprofile.net/proofs/artist/d3441f28-ea7f-4053-97fb-c93e05141141.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 0x8b40a5317ad40431a52febc4a8cecfac7f76554ec2c01603312406dbd8b4142f. 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/TCAHN2357018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9642fdaf5c9cddabbd0a075de5d03b286b315fa550f475cd61bb4666ac9018. 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/TCAHP2389455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3103deb6666e4c58381dd7acae117bd12eee8ad9e3478031caca5abdb81390. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHQ2363275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a56ee9f598a83e9b0be9def8b19c2c732610cc8a5f1549c70f0d64aef90d45. 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/TCAHY2447295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3a8b7f465b0a29637cd8936aa2fdd5b29d73f688dca38da38a7a49b8e93eac. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAHZ2466779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf858041e62df64209d1de2f3a13b0d547948830ab990dec9573861f149a445. 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/TCAIC2409342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203c3a29f6ff093c85e97a4b407cafde431c65eeafb5fb06a1a8fe363292ba3f. 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/TCAIC2458268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a72e0246e16b2ab602c9fa1dc3113c92c05a6f47c33f2a51873f3431e11af. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/TCAIE2486090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72beb8206f47039240cdcfabf9c571fba31764cf5a4c0f6c10bf5ffd0a3d59d7. 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/TCAIH2462267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4228ec90ad2b31901688cec8bd2fd4d44262a43871ed975387ca49b39a75a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAIS2421401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c6563a5d2b17bb8d9aaeea3e17d6f5ba6ae8aa5798722127d937fc0e11f7b8. 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/TCAIU2458268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e616eac8539db03040432d2d280c9d3b588a09f2678cc6d8be485c8451d8ca5. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAIX2477054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ebac4cd7b123d45e4069017a99e4a6b25221b1789960e87ec0df6e4bcace1. 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/TCAJA2494566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c53149dcbd779451c498b8a61397fd29704e1a2f30645d2625fbe749525af5. 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/TCAJC2442641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9bf0eb3494d8b29021325afb3e1fe19fd91397fe86061a811f0e849d58ec98. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAJD2422760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944d1eb98ebe100d1ccce9391a612acbad45fd6b6ec75d6542c1484cd422119c. 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/TCAJD2455723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f97a55f6fb246b672786f6ce5ae0d08abe3648f14c2d73543356699d6f27d6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJE2538147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b2bc88b2ecfe7a210c003189498d44da3348839a759399376dc0bc4190a4d5. 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/TCAJN2560606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd747ce6d4c4065eb430a70d5bbfb95b1537e51e38fadf2d507498a5a0e260ad. 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/TCAJN2561825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c5ab58f296a175f4526437dca81b00c626308a398e3ebd295278f84b741150. 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/TCAJT2584671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9032efea8e2ecf64738a3473dc0add6dbd1ce8ce802fb7da5633383d3fa39d3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65Y2592098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba480cc551cd7fcd327e02a14b5fbbc63874d8814affca44f35309293dd6e49b. 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/QT6632530792.