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 0xff4e21298df5d9cc81ca2f78822b1d595b8e0af0d1113374065943158b31da77. 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/736f9e92-1246-4dab-a6e6-16314076196d.json and https://artists.proofprofile.net/proofs/artist/736f9e92-1246-4dab-a6e6-16314076196d.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 0xa214308ef623bd926cbe2e95ae472a9326c05557eb060a5fa92be621f7a48021. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AEA3A2029678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ceb83f99bbf32498ac776c5c27a6097421804a4990f294748f1a84edecb59. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/AEA3A2034465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6350c4115a8185863cc0a87b7746e97cbc8a171bec565e61bbf55090d613404. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:31:38Z), 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/AEA3A2066357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03f73cb6c6f88d94f2bfe2c866ec3e2b02009eb29544e0d0f606522715ac4a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:02Z), 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/AEA3A2092741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d0e29115fc1e03381c3b6b299e6f97cbe44e67f115aa21acc7686cb0099c90. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:33Z), 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/AEA3A2016932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ee5c8a01e8a0e732ce3957d0ecd6d34b1d3eba33e76493acc52d3ad10316fa. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:25:53Z), 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/AEA3A2081394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfa4d0fe4fb2ac0134f4f58ad781de7256630a18c23c9064cf35936b2342a57. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:33Z), 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/AEA3A2036478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509c137e19cee52cd0822c5b80274bccfc77b9202d3b183e59911bbf786c6c23. 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/AEA3A2045542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3470933368667c9ce63d94a816eba77ea1653f054b173113b46b45d363f54674. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:38:57Z), 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/AEA3A2093159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fe4108e7015ff5b4310d79f6a4521ca27821bf6007574f439577955f2d482c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA3A2015427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f7f9bb8e33e4d06bce7d33607e095b0714ccf1ed37cfa03a9d72c0aa58897. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA3A2072818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a5070a0f118840bdb951e5cf8ab3d37f39bbdff53401a3ce33df34c2357a18. 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/AEA3A2032852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94882330fa90f3305d791f23d2b455447124469be4d1e4e120c5a4c184b68c6e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:05:06Z), 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/AEA3A2044937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b341fc1a51e4ced31393f2d67005a4e1cc6f67a9166095fe428feb1227cba. 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/AEA3A2019985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56ef33e563ab1952ccfbc9510aa28d8c9c62e7e7eafd988cc17c88dfaf7cbc9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:40:53Z), 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/AEA3A2098618.