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 0xd9cfc0a1b4a5122795afe65750fbb02c6c26af0166bea4b539ea226cdc262189. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8648b5c-f09e-4b50-ae1b-b5ebddfd6bbc.json and https://artists.proofprofile.net/proofs/artist/e8648b5c-f09e-4b50-ae1b-b5ebddfd6bbc.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 0x909e36a4e9c4d3195af1e54510d82e5c8f31481295c51e267b465e059976ab66. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TWY211501103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b27456cc5dcd0cec55a194d443460ef514126e5e4da6d55436cac5f0f6a4e. 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/TWBN31700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de61c42e1899c9da8622760a4f1850b8b55a60cb2aca00db0fc1b28be7a06da. 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/TWBN31700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aade9c926125b5367abdcca43429f4330cb78afe7d08e5e8caf370e7e1acff8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWBN31700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1c533def31e103ea5be09d143688ac5d67ff96789cd654bc9131e29dc07e0c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TWBN31700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d08867236105265afca60af0084fac40e15fbb05433fe4e1f95d0e300f6ebb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TWP012159501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7db014d460e6241867b56cbb0a66005b19db4c7c60e0fb99e26a52f26794c1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:29Z), 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/TWP012259501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660ef5b4b2733809480880588ec2df2602b98d510393cb08894cb66f26d4e66. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:44:25Z), 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/TWAE32500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8fbf9711e9b506b3d209b9f11880a021c38a7a28f4a2b439fc97618ce1850. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:32:48Z), 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/TWP012459501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660ef5b4b2733809480880588ec2df2602b98d510393cb08894cb66f26d4e66. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TWAE32500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364ecbca1d10fa599e1cd05493017f6f31f748b29e70e3ce6fd2fd56c60cd271. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TWAE32500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96082abda552197644a2c05dca1562cb81a2e48007c6cee4713bd3dd1fbb3a57. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:41Z), 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/TWP012459505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b3fe55017bdbefcfe357e95dffa3b93730d0c8b53b692f28673039abead351. 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/TWP012459506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe259b448520c10c2dedcb0f0b368f04e2a1aa8eccbe75c2fa385bbb0c63359cd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:06Z), 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/TWP012459507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180555b5d2f639a8cca7645424ff846b1091a5ae9489e9ca9d99258c11b9ae7b. 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/TWP012459508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e081c5fa2c47bbe38546faa842095ba27135407cbd64da821a9c7eee0be00. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TWP012459509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf87073b446c8a53b3586adfde8e56e267c7ee8c4048a0efc34a49f24098ce63. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TWP012459510.