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 0x9f169cfa1bd2823ce9bcedb39006e1213fd8c95ef5a8f9877394bb207c68b219. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23f30893-8e92-4b84-9944-cc1178c465f5.json and https://artists.proofprofile.net/proofs/artist/23f30893-8e92-4b84-9944-cc1178c465f5.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 0x3aa8aba11eaae105b3762f8a6f0fdeb436c4093ab2d7caec541788aacf4204a1. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:35Z), 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/QZK6J2207850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7aeb0db8149fa299c18b0be798a1f386fbdf29d7bb3082c5a6966afce41c5e. 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/QZK6J2207858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd416755ee7dd3586414670f9fac4bd6acd35c5507a027dc944b415c39235e837. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6J2207859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014621292b9f41b9c9f9411c13115ed3cd13a1df997d813b0e058a44334b3a78. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6M2265260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f5fc95e6a015dc78fbf83582525864c109d218af89f5d8f138030ea5c95c5b. 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/QZK6M2265261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95ba11639e007b8bd904d2decdc48248470dc74bb3327330425b19fe6285006. 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/QZK6M2265263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f13a25de7fe7e3ca5dfa16219a1200b0a65cbb1658e603f98c2d296488922. 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/QZK6M2265264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8dce8add61c3a195fed6e56c292331864a150ec57f70aa9e9fd5693defe54. 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/QZK6M2265266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37194558f63f521b99eb5cc6d827f17661cb672eb2f1f72a85feed11f45d038. 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/QZK6M2265269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d2134b1c774b72f1e799913b4985600a3a5d3e8248b0e566e2e5dbd3cbfa71. 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/QZK6N2254286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0bd314e6573e3c3dcf2e245f52bdc4915b6b247a7236a5d959b488ebd3e9e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:34Z), 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/QZK6M2286807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac614b4f46f85eaea360ddcd43cdd9b2e392f3d4a22cb97864ef51743d93ce7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:40:28Z), 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/QZK6M2286811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480e4fe25c4a9e43cfb9df0f8481e218717ae5cf1a93b3087b90e8a2d99a55e9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6M2286812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf568426199c48692b2c83805f53c2986303980fe3bc953eda87b2d6aac4a0aa2. 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/QZK6M2286813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ea22f2fe3c417bb9e0a8ec80ecf39f4644bc8fa058189747a3faf87c59d13d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZK6L2276927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb63dfc44e7e44ec1615f7583a8d76016ebbbb1c5782903f40a496590a415389. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:32:00Z), 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/QZK6L2276928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa085ca2fb46115c23bc42a4173217e65b7dd5e1e38ddc02f870c55eb5d710e3b. 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/QZK6L2276929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567d8923fbef0567b11ca8a90d39596204a12dcea8ee0374ddd8081ed5bd1a5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6L2276930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60e6ca3e57afbdeb097ad7520dd36ccf220433bcd1bc6e7d51cfbcd9fb2a69. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:21Z), 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/QZK6L2276931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b12c8df583e75a64efe469c7fa947bd8a31f7c043c731981daa080e0001e49. 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/QZK6L2276932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914158d71d909dc8fa93565edac14f8f64d68a590fbc5541fb0f2ad31c60346e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6L2276933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e27e765a64223e0c73a03c3bc8f06e031d09c8da507655aeb27c74a037f5d46. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6L2276934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3017ce50462607b08ce885df7fe317fb2fab508b5190e0091a16c1e0f3111c5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6L2276936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd64328dd3453e9645b0b2376827349dd73f0d95966cc278667f3eb5259397c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES52420771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7012bd19599e5c2f78a8d9bc87c0f55b1554dc41f30837b38c263cc5e52074d3. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:14Z), 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/QZES52420772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e45b81e2f2fc7ec6511097581d31b7f0db27f879f709c7f77233177596cf4c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZES52420773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f824fa2ee4209483bbf09d668f47eeb478734e41206fa4defdfce57392aa139. 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/QZES52420774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa112536bad5d18ff28ffc656f7843ad1df9788763a9ff8978721a96b453c6d94. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES52420775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bd3e9d2779a4199504b37cabb942fb8e8981a3a1377f3135c2433fd987c775. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZES52420776.