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 0x0b4e08550728c693f4e42c20222c736196fea4679257c00adc982c5f02772025. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f4faf65-17be-4e90-b17b-ef7a4c9b89c7.json and https://artists.proofprofile.net/proofs/artist/7f4faf65-17be-4e90-b17b-ef7a4c9b89c7.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 0x29ab95f634e6031007f82ee220b461ddf841d95a6a4515c1e53209eed65296ff. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZTBE2390736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994588270459d600aaf817a8884e2b516211251c0d017adde74b286cf52f078f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBE2390737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b5d1e1525911a65ee0e6910aff11cb245bdfb321405f0f37c3076b353db6f3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBE2390739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef0968a16bc0ab45e0742f968b44be3a72b5973d2de6c4a2a7b47c6450a589. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:17:42Z), 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/QZTBE2390740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115a0ea52ef3b56ecc86de11abb5c642340505f00a2f9ec8b4e52a832b4f585. 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/QZTBE2390742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00a373b0e1f6d0a10eaaed4071bf62c703ffe4b5b22d1ceefe3727a1e689ebe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBE2390744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31fac3ef04047aa804959f5d9a2e4da825db4afac276fd7d8f275d607d1803b. 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/QZTBE2390747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c425d071aa3fe423b50e5bb4c86b8e354d59751442f217e78bbdb6664d8c40. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:41:49Z), 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/QZTBE2390748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23db9011396829c624e14d6c0288e2de33848e3a34bc058aac186c0ce5e82216. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:34Z), 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/QZTBE2390131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25cf160af38996af6582aa1d555c2dd4a727b1f49f7e494cd49581a08dadbdd. 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/QZTBE2390134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eb37cb669ea516ccf45e7ad4fafc67981b5cd00a01d15b323d194a11b48bb2. 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/QZTBE2390139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb8bbaf367e92d7514ef22b781a971615131627b8892cb89bdfe735acb177f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBE2390140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9944c97035662f75700a4e01c7a5bd52835f6b6119cb6f8e908949898c0e463. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBE2390141.