250px|thumb|Pedestrians on a crosswalk in Buenos Aires right|thumb|A sign in Belo Horizonte, Brazil, directing pedestrians to an overpass for safe crossing. A pedestrian is a person traveling on foot
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 0x9a585cf3321d9072656bbc9bd825aa9f596d41bc1fcb060253b084b37f3791f8. 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/d207820b-51c3-44eb-be80-17ec1ade8753.json and https://artists.proofprofile.net/proofs/artist/d207820b-51c3-44eb-be80-17ec1ade8753.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 0x9e8943ce64788f6bfd0ca3f2b89561c6d5b179cd48b677e0dc86251d280f1842. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBTE51200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fc6bbe6262deef73a5ccf4e5cb56dcd3eb2e9457156bf7527b873b0894ae1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBJX36115010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d330142a828ae4ae0314a1e24e882d5aad29acc80e3345a01feb4fdf7557c8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBJX36115001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae060ca4698e8b5d15e2c0eb06997c18419a6b37ee16bcc5c44073be98bacca. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:49Z), 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/GBJX36115002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36925d72bb00f9236f50669b6d0a111a5ec5549f303d941ea48afd89b8864c9a. 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/UKTFV2401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b776839acdcbfa0d57f005df58820330769849184d9407d69fc1bdba4949244. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB1500101.
Spruce - Jody Wisternoff & James Grant Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9aed6632f2fb328dee928e4793fe637c147499015e4ff8c6ae439e7d161402. 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/GBEWA1601716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24722237ae49a76cf115e2ce7a615b4e7336cb83abe577d2e6ce2e099f28c00. 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/GBCFB1500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae603d4991c07deaa45afe36e1bd065aed5e9db05eb744136ead81372710352. 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/GBCFB1500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09f2c0708eee9eb2332a99c457d90a96c5830493520d52c64cb05a935ceb8a1. 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/GBCFB1500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b78344604ba9e6a23f20abb1e402d8ca5b6413299d08e3e7d7ce91632783686. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBJVX1200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaafa76024d6429d9cafaf335c8dbac442111c068ef4bc0d66f77fc4541df793. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCFB1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22426cfa8b6b58551f89087d520d0098da716f420be128bbd4c73b2aa67b70ac. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBCFB1500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672869c72ef57320de67ca1a07826dcc0eeb876511d7d9297f19faee00f98ef4. 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/GBCFB1500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b776839acdcbfa0d57f005df58820330769849184d9407d69fc1bdba4949244. 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/GBCFB1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4c53c98849a33b16c1c570735a81c5e0090ba9a293c29435b2ece0eb59c3ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEFR1208106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b78344604ba9e6a23f20abb1e402d8ca5b6413299d08e3e7d7ce91632783686. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBJVX1200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ade697e670242fa3d68ebe1874b00dd624ce011f31756ed423208fcaab5c73. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEG931791867.