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 0x79d7c0c20ee9bb08623b6158f16a99a7f787a6f80b3e18f581eb0a3645cd1ae3. 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/3ced15d5-ec08-4441-8598-c7d5379e8a6b.json and https://artists.proofprofile.net/proofs/artist/3ced15d5-ec08-4441-8598-c7d5379e8a6b.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 0xb14d7cb816c45e68da914922e4e958f6951ee45c2c0122973c65124429ed2057. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES6920400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa251a05749907d14120885cac4f9a7def3ad3e05c10395ce1719ed8a68f4d0f1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES6920400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6061bd0aedd9ba4dd422c32dcd50ba31c1016f720236f61c3b27ce579c2c85ec. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES6920400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1a5b5b6494cedfaf0f19f2a3cd6e8957adecd0e0ec51259bae09634c14ac79. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES6920400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1d910f82e4310d3dd4515b42356934ad37e46c7d9309a5aad970619439c27b. 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/ES6920400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791bc9fc16d0f0586c4acff2da3f1dec35e02ef19283496504afb6bfa5051b7. 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/ES6920400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1245233633bd0bbb7419b81158731e77831210230349e31e7c25bdc3aa4eb224. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES6920400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721bb441fe9c7361eab835c89ae21ebf2ac3fea72d06d103d6e4c173ef26991c. 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/ES6920400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1471a1ba97f18e619c96ccb59133b6ec2fe99061ddb1ca5333356a2f624e8d3d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES6920400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd661e860e43cbf9b87fbe38fad1e969b660dabc03887a638436d01e73ec80242. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES6920400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ed0f0f4df099492e09b16f0119aee19af5f1d29eaad75e37aaeca1102211d. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ES6920600508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe632db7d4d477d91ee2681561077f0beba18d876b06795d8b81bf63bdd5fd0ea. 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/ES6920600514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86485a4a72103ef252f0f1d866794f9a2fe7ecb20c37d53bd43054d62b209477. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES6920600511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477f9420016f8095e8abfc080e796c36074980545ad22fdd51896068b403669. 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/ES6920600518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bb5644ba1aae0ad4ddf4e3de467c2e045a97abf868d719a16fddbf0c96378c. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:58:43Z), 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/ES6921000914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b5debb9da79defa88583826df44e18cd98adfb6bee3d85e0720262a969950. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES6921000915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba23d8429f9c1afeedfbbc3adcf036ad5661a7f384c609ee87c0bf5db741b06. 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/USL4R2018028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abbe6f2ebbbb2da6950b35cf8cd4a9e617b33d828d0c6381d7135891f3f970d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USX9P2043588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bebba63de39156835874550690d3daf83ca9b2182c82bd6b6303aaa84369a6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX9P2043589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581fd05084a00b5a05fd1b265b507633a72914ebf028eb478582f282a484c7e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2043590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d59e2b3f8fd3b7dd423189cde0d96abd5b66f0102c22ce99a72a050d908713. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USX9P2020575.
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 0x5374c10e2c988c112916a2fd323e36d811388233bf0b0b8c1d0d588d222f34f7. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USX9P2043584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e192ae4cfd4ff42e7a2b292b30849d00bae0ce1c34db2db4d1a7fd4855df2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USX9P2043585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde86d62cd94eaabfcccd7e2a2ad986b29a69749d1c23224176c3868fbbc69e2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USX9P2043586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec6c5b275d8a8b15dfc508770fb24d8482d0482d1069dacca5bed6b62e551b1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USX9P2043587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b65fe16ab53863401e72e0a0513008e9a936915819c7d1da054d6e732c06fc. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USX9P2043591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54bca99d870dd5745fd533429c01195e052d4e6f51dbea113510302dcd4019. 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/ESA011564663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9876cefa45e446ab07138e00e4964df988718fae947eba47288a108976e51652. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM82453858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c253fabdd44c6de8a17a31c8cb12b7407df427bf2eaa7adc2a2d9e2fde3e3a7. 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/USHM82453862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d53db52e187b37ecbbac068621c4d40eddf36206c81f3beb6a4c1123b144898. 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/USCGH2555083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f0081bc33913182ec7f0f442a2bbd3fa6784a4acda78ec96e249fe82b5d8e2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USHM22594599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150b359a56be56eac718534bc52f469076d57de6829b4bfee72f53adf6dce14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES31E2404532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52770580328b80c32911f776edcab03472837e8f223fee19ea6235501f0a042. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES6920800771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0276627de1a32008ffe0c0c5574e1d504ab3a7746b3beb8c62b050bc76676ec6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6080443609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9adba2da77b066a789377b653519fd0ba567d23c41a391e98bf7449956913bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES6080443612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2a41b91c3494ef93bb5eb2473980d234e07ae78f22ec9e5f04d09e6d1d0b06. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM82073224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c2d6e8acf0607514509e9d582c4a18216a07216cc4463519322799c114835. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ESA011302118.