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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8459d78a5010244020b072799b9c66349106cb03c214031faba7da2f30b8c5f8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c97d6c51-d5df-4cd7-ad79-2e4de28a9328.json and https://artists.proofprofile.net/proofs/artist/c97d6c51-d5df-4cd7-ad79-2e4de28a9328.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coloured Remix (feat. Wale Turner, Oladips, Terry Apala, Mzkiss)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df992963506013ef319c33ce9a58524d1eba6444d35e286d6f86eb5641bf0fe. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SKA011800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652fb64a6aab481dd403e514db477627be298492cc368fbe3efcc40fdf9897f1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/SKA011800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2301ad3b01d58e9d7e321e542daabd38a67c0b9688f539a404120f9925f12812. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SKA011800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe02917cbee8f11044f16724a1a2db8253063a682768429eb4e63a78b6bc02e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SKA011800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b721387909be7d7733654b21a8fe72615830b785540d619ea70e658a5d78d8a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SKA011900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6a06fd1df84782cb6859484ebcf78ae02e8f9f0c17e40032193b0adda11d65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SKA011900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ea3e20d6bd98cc903ae71374f4fe7e74d5c58ad7921c01fbccd77fc73fc857. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SKA011900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc425c93402c533d935f721fab8172e7c4d13f14eab11287db82dc02d28dab05e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SKA011900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680680e5b731ee3b76c2eb63e71648b12b95cef46cafd33e36018792b615f2c. 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/SKA012000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bfdac4f9620d3f20069179e09dc145b9bb48a2f9abb2151cb44b3f6d7a1f7. 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/CZUM72100418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1162fae05096b468645625d222267b8e13cf427e827fb402c53ab07ac182721. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CZUM72100417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bfdac4f9620d3f20069179e09dc145b9bb48a2f9abb2151cb44b3f6d7a1f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZUM72100418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ed9e9edadc2453cfe94d7dd4bc6538cc4b79bcc451b5ad64554adcf21dd000. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZUM72100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d23b515a3cf3aeac4b796a0d54e0f62b70c5375da1a728c3aa66b34635f64. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZUM72100420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680680e5b731ee3b76c2eb63e71648b12b95cef46cafd33e36018792b615f2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SKA012000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7787a385f62af523203235fc2fd2b1648aa20cca41600e54e31a40c4a25bac. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CZUM72100421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058a6244c4a81cabc000a606fced32f24912a5f9f4417c750f8f01448db36e63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZUM72100422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6f132ee667602ebb0f358d84c5b90f2077b9a59a143368b04417f95630c35a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZUM72100423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf240dee2eedd0467a70e2443a9d445555c59e51635cd84048ce3495191a0bac4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZUM72100424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3598393f9c679d084d6a0fceb7a00fab41d2317c25935855c01e084cd5366d21. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZUM72100425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0737f3ad134e5f0004f1d1abd2aaba08e1497b7f8874947cfc8dd381b379ad4b. 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/SKA012100337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28625710d54b0f28d16b7d5237596c9a1383f5b8e07c73caeed94521bd3cfc4f. 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/SKA012200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d521bac6c7c5b8605f193a7e17c89e6b8a228379cbcb6a4ac08f79802cea77. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SKA012200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5820dc871b5c4339f1c54015a716f7faac51468a159c16e0b6daeac3128b7a6. 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/SKA012200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c71658b9079da1cc23db0283b99a1d5b23712fb9f3d04bf51e5cd0fb00d52b. 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/SKA012300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7d38c5ba003a6852aea89eaa7a7734293e84e1946eb08341c8e3f6d2b3268e. 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/SKA012300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ee46c7387d7d617eafe61d6d20e4f0b9514ecae14f8d438ef4d49fca8b85b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SKA012300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e6dca4e53c23b4e621f6e34a43af0b5202da3ed93d64e8241a143d8ee73d4e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SKA012300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578302e80c0c88dac11c9adcf4b51f2c79255f227f59536657dc5a0bbae388f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZUM71900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea6f59db652e1dc2ebe7d6d95a5514a9c4269bac81cb08722a28a330136236. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SKA011900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b36bddf8d966e63a3292970d1d2ec02b0fccc2bd0c1cb86c943f33d607c9df7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SKA012200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a352b1930d0d6b4e6edf1f82eda5df9e9527988be19aad50c936f74562ebb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882228263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6022e8e7c3e986363328a9b68ab22977689fc8320716aaa199ff8f8172e398cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SKA012100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59373c6ec5760756e5f0517907d6d2c43be3483913272069d0a3172dd6f6cc0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SKA012200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ecf3ff53c6576c4dca70dce3df9c8074308fc653daef54502881e110b3559. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SKA011900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9131cfc54201ee35c9f22c0988f19a5aa346bbf3e184ed72961a6e4147675e99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SKA012100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e7a2f6ccaba7ae7355a9887c0fd650ff790f5f5fe629ed0d2376a2ab0d3906. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SKA012200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef76b237f737b73771c52a64823a92c0b9172f7c1d1f13be346db4d2875a28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN82298188.