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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b25538d2d818a49d3c33904a802e3bc0cededc38b080406f31b48771e56f8b3. 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/dd931662-cfbd-4c8b-8ace-3a9d3738682c.json and https://artists.proofprofile.net/proofs/artist/dd931662-cfbd-4c8b-8ace-3a9d3738682c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0654ff902f4707e448884fc6431b242f44ba2b571c940d2aae57206a23517310. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:07Z), 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/TRBIK1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cccd7ad200079cce9e404258180c5dcd9828f474914ed34f6ba6f5173f16ca. 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/TRBIK1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b1340bfd76f59699d918ad133386029eff4cc9abce8f5d49849413fe2be9a3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TRBIK1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db63492d617c5deba34e22831a5b8717d56684b4e0b90cab146f5454b77c1cc. 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/TRBIK1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8552c79e919efc03affce7d69911c912c12b3bbce2e2998e998dd5deaaaea. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TRBIK1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac32a7d16d4b65279934f43fd58917f7be3b739ff14e87c3f0d9a8390f701e. 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/TRBIK1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cc459c39903e6396d97e698d771535c16a1360d5c22d2f797a1aa813f5a842. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QMPKX1820941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6ff90d2c682acb86b0ae608e978abd398635458fcae6f595f3fadb498be08e. 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/QZFYZ1931107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad807eb3abb7f8da4e20e2a85b1cb7694bda804b9634f1c06556b6424659433. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2005622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f806e83c3cb10d3c641b7872054424ddcaeaf7c5aad9c615382d279e270e07. 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/QZMEM2005623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202562f7921bd760a72bf99e2eceb2e7f96d7526df2a8371b51cf76adf2147c8. 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/QZMEM2005624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7861b95514313f98657c1f6f7d3e8b8303606079daf910554ba8a1ccdd799858. 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/QZMEM2005625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395f2ff59fde3f7b1cc8918b31c74901b692cd5aa435faa76a0c2288e69a143d. 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/QZMEM2005626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af55b218163f6d7af7cd2caf292b20231375eaced857bc89ab28bf2ef3090fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2005627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82b201d6bf554564f418a9a659863f1e79228a8e5def3ffd46f49f77f290a8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2005628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55132f77b7a17a54b7a37d622c28775f828d9d222a99366e5b4716490c4872d. 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/QZMEM2005629.