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 0xd2a9d134b1ca9d199e90c732e5ebb4e2b5bd247d238cc11182a6afaca01d6f34. 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/8ddab4fd-c64b-44ca-b94f-74cd19cc69dd.json and https://artists.proofprofile.net/proofs/artist/8ddab4fd-c64b-44ca-b94f-74cd19cc69dd.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 0xbc7fd9991f6eb6aa8383cc1e95a27e6fe8ffc6dfceede5a6c093b443614db968. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZHN41929618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fdc58e230597b3c42f6421df8100b174c772446ca60815ef2fd6868610fbb6. 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/QZK6J2032932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe72fb2d3a551d26bc5055151f709d6546bf90460ed413e29786db71c1db6ff. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZK6J2032942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4512030fc69d1550030dd97c601f8cd1c1056eaf07f5a858bc5c520cda8e2b4a. 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/QZK6J2032943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f76cacb27eeff75c2e06040d3df565885ad760c6a2a615b9d6a8b61d95227b. 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/QZFZ62170192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848977f2321395e861ed7065eac4f45cd9b5ec67f2a2e0354bc46f3fdd842345. 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/QZDA82107696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a080401ade0a7425410da8963c807e177cd16275cbfbf093983313094bf4277. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZMEP2182654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ea224a37633f10b54ed90a9c7f6bfee6fe4bb5a5bbd466f8d2d43f4d87ee4. 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/QZMEP2182655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ad884ac27ef5ed69045593db97706e2f1970326efeb99349a8ac1a2b4a1a9c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:07:04Z), 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/QZMEP2182657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26015027d735de683a996f70dfd962d5770a7d0f6c111457089eb99a7d43158. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:15Z), 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/QZMEP2182659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00b4e7d88e941494e04bf4953fe8cb25d078723987cd63285023af1fdba6757. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:55Z), 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/QZNWV2295095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae730d665f5bec742417d86e7e6692eddf01f26fbe40c3edb6d01022eeb7eec. 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/QZRP42240046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4289a498daea3688ef3c0764871dde434c8b407418d8c413fb249e4b5377db14. 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/QZK6J2264698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08acd3a30491490b54dc21d88f619017ababc4e5d66d36353f64016a204ad19. 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/QZHNC2326365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b0d7efa1da0f42979c9ddb7025b2d30f29d52372c8be2c2078db58415e0d7c. 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/USXQS2333052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261eaaf83281620cb11d18f99eb7107b217da67b5b1cc83e90c2ede03966a288. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTB62235819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4975affa8c9044854b1af7d77a2894c4dc4d1dcd42352174d3a388f621701c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTAX2377276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c49d2460753e0251da5c708472a843240014640e8c8e2bc36dd59e5ed3412. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA2P2355370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c052a18e2d388094fa9bd57a76d838c594cb4dc0b7a78414173620c8e8d6b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:23Z), 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/USA2P2418631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933e76229b468159b1a0b829f572310d034e0eba6a88217bb1586ac778d4efd7. 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/USA2P2454498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948b8f133d7e3bd4be412296e0fc1d4d3645c56e09cfbba87d5400652a75644b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA2P2454499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2ca9f956c124da827c166874b1741265f9d35cc9eae238c4f8483129e2442c. 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/USA2P2454501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd85fe22b6adb923ff1b1a2b8c2154448014ddbee791cedac302c884a4527e59. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USA2P2454502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1962b771816f9053efbe20acd948b6aa08bb0875c5060e699d4efd3b184a7b. 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/USA2P2400905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45407bf7ad0e8fa53debe2b9f9b458e1569cf5d54e081c480b15ae141da8f85. 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/USA2P2406721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a3aa5ff85f532a691d98c8ebc99b62d4364456fb308e516c0517b9449fbc38. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:13Z), 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/USA2P2351579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd2a64bf01d403c707d03222e459145040471cece8d9120ef4ca25275181909. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USA2P2454504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d89a2057ce5ec34f8a9a335080f5237438ff3749bda312d74ddf2c5beae9a7. 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/QZWFH2468446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d89a2057ce5ec34f8a9a335080f5237438ff3749bda312d74ddf2c5beae9a7. 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/QZWFH2468446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182bdfd506cc989aa19971fa0601f07e9d4ce94a45448ab0c97b40b379870285. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:05:32Z), 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/QZZ782484646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0734336a30f52c24875c9894a4375883ee80b919b19c7e5826a3fec725ba061. 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/QZS7J2535580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6e5ba042cc7406e9190a5d3eea124b931c772f6ee4e41942eb79c38bd0f20d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZQAY2596259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe0081f093f39a4d5bdc73bb8b109c4c076211692ff2fb88bd7a8dc17f0c30. 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/QT3EX2470397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424a7859c47f55c430eb20bf065146e7b2d37e7faabeac60f81a7a59100fb0d. 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/QZQAY2506826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182bdfd506cc989aa19971fa0601f07e9d4ce94a45448ab0c97b40b379870285. 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/QZZ782484646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60544c0d2b1c2e35530b719a49b0ff0e574c297989435ef18144d812760c3cee. 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/QZQAY2597636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f927985c5e867b21d7f8071b2ff93d10ab5ac30b568df7c727480e93a19d993. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNMW2578274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3193cf2e67885b4637ae9567309c14242b005afac644acdf83186d966d3cf. 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/CA5KR2358299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628cfd55218e548fb742bad43b7bad6dac4e63a3cc3cfe64b2f0436a1a450b7. 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/CA5KR2358306.