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 0xc668305111ba2cb8aab20c1dc95b2b62333617b7b57be0a587d2013ebe111e22. 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/dda87291-3fe5-491a-9477-d3840c4f6fa4.json and https://artists.proofprofile.net/proofs/artist/dda87291-3fe5-491a-9477-d3840c4f6fa4.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 0xae67ffc2a9edb50fbc2409718d3e5ac71b31449c7bdb8620cdf0d7d055637c36. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US32E0410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89233be88f38eb5265df92a6fcbe4044ba7df575bcd362c1f67357df94f447e1. 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/US32E0410302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602d2a80cb4a31f6dc89108128b91b6ccbd07b03716b4d96da6398eeab3d1d33. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:25:36Z), 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/US32E0410304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779e4cb13aa948328b748f447f97eed6de455e4a4e9760d55f6ef7dec3d991bb. 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/US32E0711104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5883ab9a797422dfad8aff948fd00403cca78e9135ee3045c5e9e0cef9f159f8. 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/US32E0711105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48e82dadb62af32f6cd05c6f40ab10f66c0039a3cffe5cdcafa9d3c41522f9. 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/US32E0711106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5b2fe81b577ab41fd1a33dd6c71d3e1145bb5171e00ae873fdf511510afe6f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:50:26Z), 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/US32E0711108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc847cc30571a373e1f2d43de6635dc1aa3cc234ccd455778344813f00fa75b54. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:03:59Z), 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/US32E0711109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fa81c9e6385a7eac2fef7e60e0846c216bdf415ecb06d719c1557a3369bb0d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:43Z), 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/US32E0711111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680cfc9b5d7302cce67f575ba660570149fee66a1cf338aeb15a4b2d94231847. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/US32E0811001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd76673f9768f140a4dda9b7f340b4e378880477554f7374db504c9c560c64db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US32E0811004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d5c1a1e2f5e01d54d8e27941a618ffd4a7eab54beb9c70f3580e8ead561af3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USTN11200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad4319677570dc3f8f8b6348ef6b20729e658218648a4feb8baae5278410964. 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/USTN11200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2ac33fac6088a5ff0a0b894a7eb67b37f76287509f3ccbf2a822c87f1c502d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USTN11200582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1e6b709eefbedaf2398aa4cb0e8e48fe0286a0936dcc856a66aa2298a84c14. 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/USTN11200588.