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 0xc954d0464fc17c7b388cd2dbbd6adec1a614cf1aa60e136c7bb19fffab90a69a. 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/c956f36f-244b-4ac8-9de5-d6a25481de38.json and https://artists.proofprofile.net/proofs/artist/c956f36f-244b-4ac8-9de5-d6a25481de38.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 0xc6ac4025b29488a86c99decd7e8a036a6c79bc9bfe6f1f7d31bcf135e8f5da41. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZ651108350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e770dcef07b6b417ffedb7055169481a33dbd80b37e153e28926cf3d452c09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZ651108353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed148bdbb2809faf3733fefac7e594838187ade78b11a2481c341823dcc68c08. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEZ651108357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f19202e32d8f779a8041c4f52309ab0217946d3ebe6915ac0f7111bda7087a8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEZ651108359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aebdae528142bcfb54678a860049df5a1ddaa39d30d6552c7c0f86bc0fcd5f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:27Z), 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/DEZ651108362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3fab4e216218c325a9c245d63be5a6468d32e0265bb479efa7db28f66cc5dc. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEZ651211116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9fb1ab2cff557b0eb76cf30060f3154fce9557eba87bfa9afafb227da2fd19. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEZ651211123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa2e2d92ed93e2e7d47cc3088c8b0c9293491f439e31a1c9f4889005972b4fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZ651113796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72ed989b55b41ee302655989f225678848f67eceb6d6ec11e878619e3afd784. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:07:33Z), 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/DEZ651113797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4f36cda07e27ce4b4cb0c6fa3595cbbe744e1403a9f00aea27104b662b0872. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:01:51Z), 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/DEZ651113799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acdda2c73aad51d4f7bdcd840a18290356367aef98897dfb6dfd383073fab2e. 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/DEZ651113802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ad0010c372f5d8ae54b70cc21f2126d8dcd2e37b08c88a49c4b94f441a594d. 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/DEZ651113806.