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 0xd3e7c924313e161a4398c747b96cb7d3fba4bce30f1fe2cc513c9a81ec45cccc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8c8e6ed-0734-434f-989b-d0ee6d43f39a.json and https://artists.proofprofile.net/proofs/artist/b8c8e6ed-0734-434f-989b-d0ee6d43f39a.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 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 0xdafa9924310d86a2a4869208b52f66ddfc60b319513d5c2f6a5c38a6efd6527d. 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/TCADO1875960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328756417a10292499fdd03f3072de804a399651ce3037c4ab728bb8229048be. 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/TCADO1875965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041fa1dc4ab982d2cbd6c821295bfedc1d52d5a25c2f8f7823a895beea2803a8. 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/TCADO1875983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5d63b2b77ad1fbc3ec29f4e4c3ecdc0379e644e123aa606d4b21ff87b7a8cb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCADJ1720756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c574feef8a65b7d9fdf012c8875d33bb16708a6f9234eb266f8919ffffbc0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCADX1867911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0282ddb6f60ac49fa441d88974d382cbeab867ac10abdd8c7ad834bbd6e83f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCADR1804769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34189e6f738577e85eab2ecd60292644ea3db295b4169b9980a2ffe54ca73048. 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/TCADX1868020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6faf52bf0caf8baba4581f1d95def9f2bd10b61367da2281012db1a9b4dbef. 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/TCAEE1983193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3edcf06d66605db2dc899d5681b745297e80961f047483bcc80c699d69ae48. 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/TCAEM1970685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5281f478fe1879dcfd5ba0555258d622aa5329403aa2a80383f549cdf4c237. 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/TCAEO1971214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10195f844abd9263ec60911cea4b99781be0e86ea60cc52baf92c1ab1ab2d82f. 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/TCADD1747932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ea2b8b5be29f00dba81b41f825c6ac4b30d0ec8996f9d9a051ed33ae124f1. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/TCADD1729473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3975d5fcd830041dd09d0ccbe1a390a176b54fbd0b442ed7d1c353331c01c18. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCAES2094034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0233e287bd2b7ff9b1e752a41cd5e9204053f5e4098992f7e3d8a085d54633. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAED1910028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78407d792ac2346896fb2bd2c2c4e3db3b5416355a0b568fd9fda14be85d336e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFG2006060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41587fc23b249bafa74117949f98aa29ee9cd6ce717528ce3c4dc51909d504f1. 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/TCAFF2082397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a8fb3aa78316e5265f492ca4b2567847078295af3715f3a7b75299f5bb448. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAFF2082477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a2d672f4769812a17a6dadf39e42c07e26d471d72f26f539ba25a6856c8a83. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFF2082454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f68f3b3b1be8c54c5ee6115168e9725ee2d1a4c2be9f142a89b2705ec35296. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAFG2012279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc2afb09918489bd3264848ece778b08bf87753c0c457f3ab2b54ad0013d6b4. 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/TCAGX2316597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c2d3a693eab6bdac154d8ca2818c9ae786805736398d845835cedd1c137b20. 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/TCAHA2395706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfb0491d41fde6feed6058e7f014e1942bf84c68c60de9884910b4350b198e9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAHA2395783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4154154aa8df481817b84dc7400cc2e4e8656e22c81dba760ab2d9a786fdd727. 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/TCAHA2395899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea716d199b7d86bcfc26fde2c7fe98f93e7f6fc831ceb4c46bf3bac455b81ffd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAHA2395940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1937552960f6d6148f3528cc74c803484435a2bca2e6bac325b0648679ecf634. 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/TCAHA2395967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d38f63ad96544dbfacead92ae7a60e622901314befea9aca4004e97fcf9f9e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAHA2395976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe581d80f7bd8d2765e01fa199deb3aae2b274534448f9803002c233b6d83d960. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAHA2395990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f76bb49895322b625bc426127f1afa929f5c4b81ff6cadd5b80cb0d68301b21. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAHS2334029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9ff84180b75e091ac9d972dbd30e32e61aaf1f76b7076536b3e7d18361e31. 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/TCAHS2317568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1b26d8c81405a52f3f94080ccf1c216d74e68b3938d598700c35215db3cedf. 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/TCAHX2456063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0212697378c8d23468d202bb716fb6064e2ef6682e85cc4ddfb5149f35e87ebb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAHS2317052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9ff84180b75e091ac9d972dbd30e32e61aaf1f76b7076536b3e7d18361e31. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAHS2317568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944b68dbb35f96de0f11a6f6dfda84f79efd7049ce51a47685f0ee7ac3d859d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/TCAHS2318039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f54788f5749b24a56654f45833fee0fa89af4fef03e1a14b0e236fc60cf6f7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAIX2472572.