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 0x03731553e25fbf47bf8ba6f029f4860e07589f1f39f0035ecd57f1eae3b6b715. 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/fe9cca65-6606-4ad4-9307-8af8ccaf1261.json and https://artists.proofprofile.net/proofs/artist/fe9cca65-6606-4ad4-9307-8af8ccaf1261.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 0x5644098b2eba6fb220fba483a7dad130020f4f69a2c9e6206485d65f5b634500. 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/QM4TX2585685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80093667747c73b5ecd82625d9fa7f02fe9c30b26347d3f86a8576fbb072de08. 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/CA5KR2473782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e25674adb47f74e459754d07b55d9e570a766a9dee43e9aee8e5067d158e182. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2473783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78f5a07b935fe8a4bb77bc488dcc37dc126812e095831970d2671749dd6cacb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:06Z), 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/QM4TX2585681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b0d329588807d8be491c8c6001aa895896e9440f27d785818b112a7b4ccc56. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US3DF2504844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522b466b70b9056e9b16b767f6de3c2afd726b3f078c7550e96982d846dc7494. 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/QZDA42498351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e6aa4e0997560e4f105c66ebb00121332abda3f95ccbe7a76ae26038501c54. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF2504845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ec6b09421cf855f59838fa315bc5eaaeb51abbd38182f4b8979ae98e8cac34. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AEA0Q2380063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad8c063e1552bff978eae3c2dba62f667e58d1a2b10e3c3311b934b9c9e3edc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:30Z), 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/US3DF2504842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697a25f5ff4e2dbc842eee2f052ca373223ea09199f3162366e61de4bd8e118. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM4TX2585682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eeec2ffecba23157185be4588556616b326c6f7e54c7b4a62c0fe7fc52f0a4. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:34:43Z), 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/QM4TX2585684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9288f47f7bd1599cf266d583941a5a5ad860565e61bfabbf2d5d32623268d7a3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR2473781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec34bc2c9a3f02f6368433e562d1b4824c20d8a8a9b6e5bbae958e3cdfe40f54. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:19Z), 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/QM4TX2585683.