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 0x4dd7c62a2a6cc9404aa09162a94dc97cdd08f0b3b2ba1e083ac4b17f889e8517. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5598b571-5aaf-41df-9ddd-7b9fd16390c7.json and https://artists.proofprofile.net/proofs/artist/5598b571-5aaf-41df-9ddd-7b9fd16390c7.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 0xf12d8d14601ecee437cb8a5f220f76e14f2e4e1b45886837b1a24f62e60092e1. 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/GB8KE2205029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1fccf8921eb57fedda996efb6c62e5613fe757920a8bb5eff06258f579fcf. 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/GB8KE2212267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a02e4ff84ffb458c236d871804a2f1443896f5e6a803293fd37fbbf9c43a10c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:20Z), 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/GB8KE2215382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a6c90da013672fe556b7cc6f8bd8e5538e8fe2d4be52d1500147e7f01e807. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GB8KE2303780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3364f35dd4254a9110a43ab8ba1e3c994f03882a447001ba5012c550eee97e0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:13Z), 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/GB8KE2307593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a8021fad0f90e80310db68f0bb050793103390308f0e0b9edd32d10bcce731. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GB8KE2310248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf905462eb910d2a33bd075ba39b9887d8e313d62ff30990a57ec2a16d75ee4d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:31Z), 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/GB8KE2403806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e80c1eebb80c696f229232577a6d841e31d8d9bd9642c6da64ec2c2f210bec. 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/GB8KE2403807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd199596b6679784d2a53a3cdc5be461ff85e730fd57270e8b4bffbf623e005f2. 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/GB8KE2405262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df9cc01a6dced0d09e238bf6240e22d7a7c4c10cf803244ef40d7b2ed9c13e. 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/GB8KE2428755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc35092336e0248d81bab070d966cf57b93bd7fa90ce295abe7e394575899358. 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/GB8KE2501388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579635e6f4682e297aa2c59d5ae1b0d745d9d6452721ad58c1951cdffd2ae64. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:11Z), 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/GB8KE2501389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17417e30ce74b5fb5f3b4128e3f3dbb9d5ae4bdfbef8d400d8e3a641ca44457a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GB8KE2501390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568da752622e0d9a4840e3eeaa042ac659f60836ccf2e3b103640291a7772405. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2380052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d00d3daeda125d2dd7072a97e5d735eb2ed630cbc770da0ff3019ba1dae44. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2380053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9584f55376ece4c551eeb2e33917aa09ebfb624af661566d92be2c7b1a1d955c. 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/CA5KR2380054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca4ba7b890aebb9ca6f635340317b27fad3d0a97a1b9d2314f8d6c5df0f20e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2380055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ed225b7b4bde95c2d6e69d8b3dd3c660fb6248881d73ac26f066465bccb7ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2366227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610bcbf9d554ca9146db3e627bc615ef8b9ff020eee5d9fdf071d4053f5f435. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2426903.