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 0xf701017d6dab187e6372ce892fda3f49b4b01c4f8458c30504c37a61b5e56f2b. 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/6784645d-6687-4882-91c7-42126c3c5262.json and https://artists.proofprofile.net/proofs/artist/6784645d-6687-4882-91c7-42126c3c5262.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 0x3417c92a7327d3ac2a6b18812e30ff2973d6b26214f15432e8404682f7a415b4. 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/QZKDK2176943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea900d61e14f665e8afd9c30ac61ced074267131b187e2274b3de2b62fdf96a7. 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/QZHPJ2124582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a49595bab71757b1966973ec42ba5ce2837659b69c9eb25b1dccf49480ecfc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMDA62155245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92e805422f96de0ef713807f3d38e91de61c81050f60619b41c36105f018f15. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QMDA62155246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ad5a593c00ebbe9db3dc833c6331b1a7e2bc1f7b0189ea8c38d4aa94f6222c. 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/QMDA62155247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7640a3ecc2aff1d36ae557eb1133afa373046f21ac9b85cbb7be5b0f3d23ae. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMDA72147862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b5432878e3e36d0ca2e3eb1b9d9a07355e5fddd5479b686e7c113d476dfdb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QM4TX2213042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe254ec4a40cc7c7f984087bbca54646e677fccb561ced99b020cdfdf164b5d45. 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/FR59R2215273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c26e090103cbc60ffeefc40950c008b2de9767805e99c5bed7035a7522a50. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QM6MZ2204786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d99b988cd07a174d00f5575a9753b4ac195d39118a0924791a78f4af0bed0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QMBZ92368027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd8706b8a558c82bda39e9d04f7e99043a74e433ee77103392c47c3e541b0ba. 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/QMDA62381347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bbdec8aa4fe62a45a03cbd23a175529adf0a70ab6ce3057e1aa794d60bd263. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QMFME2332667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4147363785d319d3f34ddfbbcd963f905d1855b9015b23447cfc8840a39767. 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/QM4TW2442518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6379f2cc1691383e66cd8f3c5b1823cae93bdd9235064e0e31e7fbc1a84374ea. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QM4TW2442519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca59ece3a6aab4f90b0f97e0dab08b6bff7ef4f01589b3955648927b4918b625. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QM4TW2442555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733746e81cb0cf9d06b67bed67aa97735bd1b6d116684a3db51f5b43431b1751. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM4TW2442556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faccb888ea78d33dea1f1690a2584860881992bcb7052b3113e1c80d25a5326. 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/QM4TW2442557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0206e0ad69c1ec36f3305a444e9f09bdd09336586ed6a33c142c9860c20cd9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM4TW2442558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171de24a5b3a86bbf220bccdaeab90696f36f7d9f99ae4da16eda3287578077f. 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/QM4TX2461914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6bcfe23cf621da2dc9bba84063bd43bc30fd247b9d21460073fd0503ef9a45. 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/QM4TX2489086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9715ddf07f64803e5ddee57c9ee74b8ed42028149c457198e30b87daee8642d5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM4TX2489087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb12f46c888cf351f9000bd7c552592aa9b897cb335159b1544ebac4b482de41. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2491395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec06741194b1f7465ac4b3d5fc5bdfcab10175b3297c14eb459a2157eb63651. 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/QM6P42416707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcee04158ed1946f36f46d07c40d87a692c89009ecdbdd5401df37d40f988f8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6P42495009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bc6c7c7342f584b5e936bfb66e633d529b941a1619ac828074684ea96c6aa0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7282433037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a8d257b2a7cf3165f2c6e70b2cff7829c59ba4cf1fea9b720c9e6e69bef3d. 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/QMBZ92437576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c8ffa40745b61cfd877d1b4256eab0d2e15eb6c359d7797815dcbac2a43574. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QMDA72424330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c55f06eb179650de3e325d28bbaae85d1519694af93645f62b44d6156f0029. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMDA72479530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda336e1f1898a0e00a0222fac57076f99986f6429e325af1038f6c3079e16cfa. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QMFMF2436866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dffdcd9d8bae1eb0cfab776fcdcc4fbf4409f463999d0049297d30a98a6b534. 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/QMFMF2436867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2ed9e1eb58a0294f704c6903cd34b250dea399c5c6aa84b647ba4de871e2ed. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2575790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091d135f33811bff4d05cc1578dfe32736f0598b6ed4d1f36efa87b3daa070ea. 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/QM4TW2575791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020244b6843042c84b04c5c77dcfdd29d5437ffc74c9dd4ef9197a29af208034. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM4TX2567652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e91e4b995414f11a5f1aa8b001e287cf77a7588be285354b811832773aa787. 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/QM4TX2567653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10314dbfa877f398f37c543ae22e965bafc7c2f85f9b85f8cc84c546ae2c7e0. 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/QM6MZ2585547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b86cddba7234b9247d79549d14bab46ca4dcd40867af70fa3c137514e216d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6MZ2585548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a967d1e9abc5d1ba818cc896c52159dc1bab5a21517b52e33583c07fb5831f. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/FRX452505493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997075cfabc38275a96fe762871a219984746a53156d974a6e2c7f2b944aaf2a. 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/QMBZ92485531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb759b006ce014625559f434ab6f9cbcfb7216656bdd7f95712e0a79cc773de. 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/QM6N22406795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820f57345c8b5e0ee61ae84bf1027a4b351f76caf95ad0439cf06be7044bdd41. 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/QM7282340003.