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 0x6077acdf4847f46368847adb0c8c994f8c9ba30af139ac9b6844168ac5cb26c0. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67120cea-1aa9-4520-9ff3-3bba3bd67fa6.json and https://artists.proofprofile.net/proofs/artist/67120cea-1aa9-4520-9ff3-3bba3bd67fa6.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 0xce33f8222e91880492f110a3a974ecdadc27daafd63dc7c9adb22b4958a449af. 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/NL8RL2462834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef48cc31368dc28ab2823944919e206c2f17918c6e1c778624269e99eb8c5d67. 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/NL8RL2462837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4fe307047032f45963d2bfdf4efbcb36c5e21e158b1084072078e7e3d08806. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL8RL2462838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488bcac3bda460f5b1c889f5e57d4ee30a162f0c405a2ea17f3535bf935cfab. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL8RL2462839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65352afebd88a16b118cdacd33eaa73bcad40f295cb259ab7573b16a23ad990e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/NL8RL2462851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3471894bf5615e9e1cfeb07b65341251112efc5701e6a5ac4e5270328e3ece. 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/NL8RL2462852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d65752ee7d5596736ef43406b30060c232665e3a64afd9c30519c23f36160a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:52:50Z), 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/NL8RL2462853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59be9f35741030b1e1b107d2c4914d801ea682a8c76127208e0f190907b0531. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL8RL2462855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f837e4314a867d68c7df4f9bbf9a80839ed8d171d8d664d7f828020783c6a. 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/NL8RL2462866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800ae6b1a53dcdba7bb18e71d06a85ca2de43e7e77d1491f912983d53212f08. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NL8RL2462867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6fa9457890cd053539f53bfdaccd21a75f3bb0d1b9dfeea5ee4f12f1e3852f. 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/NL8RL2462868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd95332c038112cad8850d1dcc00796bb20a152e5a777dc34cf03f1721e290a. 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/NL8RL2462869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde742430a1ea64f0eb018d99e189b4adf73a3c18bd500d3dce52c4bf6c47b090. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NL8RL2462872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa957fdaab417875aae18900b87c2d8e1b7ac1673335728d15acb1326ffe8a6f8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:31:32Z), 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/NL8RL2462873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78981be8b8a25792e0c2f4f35f46816d64bb908676a9e89e2886f88bd38d11e6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL8RL2462875.