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 0x6295df758f5c07f0497c4b50843e11b308f626aba8935ed31e6aef1c075cfec2. 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/343a241a-eb2e-4eba-b2e9-6d99d2394037.json and https://artists.proofprofile.net/proofs/artist/343a241a-eb2e-4eba-b2e9-6d99d2394037.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 0xad9d36e597ea9636a51727a18f8ebb1ba4fcddda31bf7aecde4e31cfb09d4dc7. 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/US7VG1451997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a7a128566b8e563cc70c1f62921860f7f434d1dc7a8097e6670e0faf30149e. 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/US7VG1453223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6ec3915ec3bf8c75ce90df3d152da94e3e4f006ee4b9e10ffe12741437b3b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US7VG1466411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7443644dbd5e0b29c64859a929f1fd35c6395ef2f5ca8f59e02450f73696d5. 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/US7VG1521122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedfa650f330e5b1321c753e0cac64f581ec333fc09f66282680029383d9ab23. 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/US7VG1539832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20abfbc2f3ffd01f621e32a8c77ca0113bad22060653e08bb8231759723aed9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZ5AB1743942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb366580b61de3ea83b5f8facc1baf7237f3bd48940e233073fe11d38712a3f8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZGLS1940729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207a16277ea685392e0875e19bd6f2cf5162ae41bebc6568db739cd0c4abe204. 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/QZ5AB1708353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d09058e707c8ea42d682a7b8e41e10d6b9275b42271531e7a8332c801f8c59. 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/US7VG1803257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a69dad368a34748991f65bd7be0402b621ceda467591d37d884a6fac9baee3. 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/QZ5AB1975424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8509c4276c25767b5b3b9afb900bd7b889ca942506bca96189c57096c599629. 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/US7VG1476189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d703c7c6543880a01716389cda38add836762dc0d6d2e0123d389e1f72838fa. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZGLS1964618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dd50da88734e59b4534f9d6f57c2d4d0912b09a6866d331c4386d0716a5328. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/US7VG1452010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cde5ad0b93f7e5cc3e287e32455889ca6ec7b62d4c26d0ee2ea6a9492220b2. 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/US7VG1452006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732074f3d959c99ab236f483c2a6cfa9d97b60ab85b163df6d2e19803e1eba5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZGLM1916200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e27b0eeedbd4e513c4dd4993b43f7230ec279bb8f6344a569c4382866b2d61a. 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/US7VG1451999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b87de9aea7f750c794145e282a9adc86de0fc1048b4a72828d1538d094ff4. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/US7VG1964008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72dde3e3e934e69592977a6d1a7d78e250b5ae9b35ebde00642b6dec832640. 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/US7VG1548884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ccd4e5e64dc339ddad664eea2e3c8f709bce57858b1b0e0900786bdebd8282. 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/US7VG1453214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d879f33fa0916ba7d3c64c98b6addcab893b3c49e2d06eba86e34cc0be1645. 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/US7VG1709100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42938b3eab0c80e4ce143dd36bf32c6e48746be1cf8916830d4649ce3eafced. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZ5AB1735494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f3dd9849171c69383cdec45dc6a6a7ceb3d4a7d3ff8eafca1f34f7bb610a4c. 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/US7VG1453207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac166d7080943a2dca3c6758917d5fdec8c2eae6daa2dde296b013c4de8a3a60. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/US7VG1452003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca2cec1385ab73d2bb0b6cab4514698e20519001a69f8470f2fe170f60ad45a. 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/US7VG1777553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321c00858d4ef766d44a0f57f2f485c176b4ffb82c05411504ef251f9c5e3584. 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/QZGLS2010576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897bb61f521b916d5f6298873e21ea837209ec61d49d8535f30099a7e75791a7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJX2065044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd954416837883151e5ef3752fcff7a3c9e9da9b345f03b8b44cb0d1933978e44. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNJV2037807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f9f97a2997752131bb783b4cd0e6db044f18e2ba7ba9381c7d6c4fef182742. 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/QZMZ92137410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef31557248d85ca253054bd3ef5a288ec9bfc85fec1f7cf192070d5c8238f26. 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/US7VG2285416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa053958966015a570365d52e7ba836122b8a29362b03b433bfdc46e5ac33e8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNJZ2261995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6e61d3b5fc0459406a4387c7654b3f2ac317db62c680e15c7fd0b7b6b3d1b6. 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/QZW9N2235332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf13ef957560909e4340b73412639f389e59d8d5d21538ee96a5a68c1eae86bc. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/US7VG2370819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c12ff30ab096a133577762f9f65ff145552db04fde41ec70db9e5023d9ac4a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNJY2395801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cac5f33eb873bc254dae15223710c17bbb555ed7897a537c3e4f049df5cf9cc. 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/QZNJZ2376750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1a027532ed70b66a9fd81ab718bd35011049bb205994afbda3eb34702d73f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZW9L2348184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbbca539f2ad5b4dfd6a02d9c92737f702aad4b626d6ad5efac8c1e2918506. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNJZ2401327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f1a900cbc0cb652c434176a3abf6247ac6f8fb91c7a97842e3b8a1364e7553. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZGLM2562101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d429cbdae465a67c095d39ec187d76e41b2a77e721d1faeeac64f57c3b3cb2b. 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/US7VG2575763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5dc6d5f8a4cf4c8fb41d39ebc0e02b150bcad2c6f07aea61350f146cf82852. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZMZ92556596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023f405d35e2d4fcaffefa415f3087d1f8756f506b0492b67fa1cb047bbead0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZNJV2548744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22037004f5704a9768859645d16eb9216eb089f1e77df36c1025a83779dc9b46. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZNJV2566345.