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 0x49c0a04d83dee324a6464e7ff5e4b9ac7aa1158233f6b058f3603eda4349bd46. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4f60232-9c80-4adc-bdaf-17a47a3c148d.json and https://artists.proofprofile.net/proofs/artist/b4f60232-9c80-4adc-bdaf-17a47a3c148d.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 0xf0179ac48c5796fbf90244d9fb09e2e00dbd81de8d67fbb371ec408d7ef50c39. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52564937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0d96d8f75f5c5ed08d96f2edfb5e4f36c5af856dd851c2465df11b5ced7b22. 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/QZHN42512066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d0d8a159926c783f7ba77ea4d2b6bcaf20daa0a4c587fa6a4a90decc59360. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHN42512067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3f25dd1a803847b4e17bad46c6f38cf1dc0437aee78cd4b198d7cdce9bc41. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN42512068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d48a4b1ade72ee8933765ed3d4ad41060d8a8d5013e9b632124f4233ae9208. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN42512070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3c67ee88f9098c0179611b8e76c6ad0e6a5ec0a17edafc3b66f5a6cdbe20fe. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZHN42512071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946231289fed8ecd7e30443a0c61397d654fdf3bb7a950fb70a8fbb2277d8a56. 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/QZES52564939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d8048449fa6e5b47ee330a9d76b3be956aeed0c25c825ef04896a04aceed4b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN42512072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fb890d61aa9faaf780b27206bc0c1b4b5247e95c58dd54e8512b9c705250a3. 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/QZHN42512073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408096b072703de734bdec8dcf907a67639d324f34b9b5c0d13759e6a58a5995. 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/QZHN42512074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81fe3b1fefc192b6f5613d39577115e146975a69ebdc6fc7cb6ec4d7a9874bc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN42512075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a58f6dc826c2f705680fa8386b8aa78a1c6093351c74d46de2ab96bc1502e9. 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/QZHN42512076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc897afe9754b2dbad16de44041c365a6532db3cc8a7d8dbd2a98ae042f812229. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN42512077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43a729040616512d33c099a829a380b9e0429302529ce008109a187036eaebb. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZHN42512078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb5ad7c98f5cc26c0cc7f8a535a24cb7c468f17810e32b3b152a2226c7569c2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:41Z), 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/QZHN42512079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faef995398605ca76d719c2faf03b7f1a7a104f9dede99ae946555de1c050b8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:36Z), 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/QZHN42512080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3164dfde38c26ba83529750011d0d2554861ca4cc39c57b4de7e228657f7dcf6. 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/QZES52564938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1fa834cd075747173d65497874b9ed125fb2bf20fc02354eb496f036721fd8. 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/QZHN42512081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408096b072703de734bdec8dcf907a67639d324f34b9b5c0d13759e6a58a5995. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN42512074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc1131344539c073355ae0eed4a145e9b739a2cc8a7c0e66fc08f0c7919d358. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6P2566654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82d6511a288c64ce8bd68efc56cc50dde905bf2434bad624dd4847f2f8f4015. 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/QZK6P2566655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd3226a3e610852e0c7caff4b734eee21ff9adff7ecf657157b78135722446b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6F2550488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c02691f56fa6271529fb9834a91032aab580cdafe23d801e21ffd19110c7d79. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZK6F2550489.