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 0x427792d781647ebe1290377407fbce66c0fc9375ba082c59a1d06cb56961a058. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6e03668-69ac-4793-ba64-767829d707cd.json and https://artists.proofprofile.net/proofs/artist/b6e03668-69ac-4793-ba64-767829d707cd.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 0x42da49312608e5fd45308a8dbbba876f92174da74eccd95376b6fb437ade4fa8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFX2479018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914e7236e07432a24e02e19777200d72576dc44de343587313d121393de46f9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFX2479019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78b184847f61def2fc2fe82acdea10d3fabe014763fbd12acc60b3cea75fe2. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZWFX2479021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eea3144f6379bab46347f16d853de8432e443ccb5d249733c3da29639f6a2e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFX2479020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf89a1c519f7d59465f28447386f03314578088d849fdf489663b3c4455518. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ782462744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74b8b8579b14691e0e4b628b8abe8b59a03a60fb5571913cc296f49b94d890. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ782462745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eaf8543f18250a14cd4db761c1cfe97b7ecf49bfc5ced9a90fe7f94e9328a4. 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/QZZ792428842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e22d53e7c862fee385aeeeded300545892185f7ae2bd01eceaa0a7938bf916. 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/QZZ792428838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b87957e000f27a5a3672518ae75ef0a8a2681f6a7c7a5f8a829371d17e04468. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ772458812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e3401c255172f83cb588d42853b2f0e5be87e96bf9742857a58f29b981de0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZZ792426269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40700849aab8dd05441d6d92d7d47a2dbe81f646d1fa19e3ac99eaadd3415470. 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/QZZ772458810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ba27c4e32346bfb98d53e25200ec18fb9af50c98d252e452aab96f7de4485. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ772458811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dc6cb1b4ad829e4c27835b3f8c9a4596dfa3fb445768cabc2de82501cd069a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ772458808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c2c241826f2d3de96a14b57471e6b966b5ce98c8eb0cdbf05ceffb7e528bbe. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:55:11Z), 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/QZZ772458813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2789a68678a1463cbd14abd28c9b0345b0ebebcae541f59c088d8c1bfc3d2cd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:47Z), 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/QZZ782462748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaefc03c7c4725ce997a701a44bd84cbdb7a46e92592485ae02177d4afee6518. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:24:11Z), 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/QZZ782409281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93017157f6a2633781af70272650d396f3040dfc17a2231c935eb373e246779e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFX2479022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9474ad351dc152428edd802641bab78f3fc58ec2afdaf59f471fc998e46909fb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:33Z), 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/QZZ782409280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4657b3737bb87d96030bc07310268a7481796a7c812ae1d600abdd17f16154d3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:31Z), 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/QZZ772458814.