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 0xd54febd089c08cba239cab04ae80cb0458c76baf2e8c483e63ef768bfee033c9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4a654ed-19e4-40c3-9fa3-f15517c008a3.json and https://artists.proofprofile.net/proofs/artist/c4a654ed-19e4-40c3-9fa3-f15517c008a3.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 0x0181f177b415a93fb6341e12ba13bc12247cf7350b5a3f767c9d59fd095070a0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:35:46Z), 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/QZMHM2326349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5fedee674ef19d7a47a7065787c635a77d122d5b075f2c19bfe887f4254ae. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:26Z), 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/QZS652279004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bff63617dc3748c6ce22e4996f41545e0eba41c701c7e3887ac0c84a54801b. 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/QZMHN2493407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71065fb64540e9a2f37bdc21112cfc2444cd626c25e3cb0003f67998b16070c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFK2474855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f30c99eea0d6bddb5c7059951a005ab3bc84454c365eeb72a0be06147e6f306. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:59Z), 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/QZWFK2474856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df75744816a3180d8a6eb3dc01050344b395d53e879f41f36756a20f1baa0dd. 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/QZTBF2438924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc07a1ef66566f4b9ee164409f0929266d59b30ac3f401c2eccca232818235e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFK2474859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab18ea5cefe2306f0df54cebebd48611cfc3b1f8a5801e284390e3d68c025fe8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:34Z), 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/QZWFK2474860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb41c00295fad6fa2a274411578aba90b04063835f480ed80ae4d0f0672e421. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZES92525240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa651152b85ff626c110016c79059c550a06504ad696ccc74dad81619b2ebc2. 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/QZES92525241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28618a69a89666d084ea458f547afa8941299c6a5efa0113e11a264e6ab2d6c7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZES92525242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982905537d9a5d6d375ac1189eb2b241ca477c999c376ee99129fb083cff0505. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB62511094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c19d165fbb175865f25e3119bef59e25d2bb7b135332e23abe61d4f53711de2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFU2587231.