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 0xb06ea91e7405305bcec78ab7cb65ba2790b0ac02ce762e6eb8fcda86f397360e. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07c0ca39-b45c-41a6-b03f-3f0c2a5ab7d9.json and https://artists.proofprofile.net/proofs/artist/07c0ca39-b45c-41a6-b03f-3f0c2a5ab7d9.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 0x921cbdf2c05e62a89bc686bdec8c0dc4963710c4569818ff0a0a4936c3569bbd. 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/QZJG52418428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bb86e633d0cf8dd701f92913186bcdf6525d00c58eca995484ebd5d767491e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMWW2439855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0467abbbcc86a9e520eee6495c5f308198ff6d1b7a1f485881ac12b3bee0e7. 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/QZQAY2409942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05248cae2b54f1f2561bdfa200af7acc0548da30ce250b2ad03decf5c3a97c8e. 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/QZQAY2480460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb07734c80ebd51de0e2bef3d5c83da0ad7abc83e768e1789480b7edf3a8f16c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWV32418641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50402ddf6bdbc444ffb60a4f39342e65b8f1003f4529969aed3b858d583fe52c. 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/QZWV32417258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6416b108844703b6bebcf21e40e108b81549e27417b444c139abec6dfabf882f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:54Z), 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/QZS7J2476413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4602b5111d69f417d06b8ab4932ab81c22005498d12b386c0a3b80c67b99cdf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS7J2430739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8092b4c313f9a71b88886af7a34260fe3382a735c7cf63605d69d9c16075b88a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZS7J2463071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08e8765bb055dee19169e702c3de18014aaf6fffefa69360034f15ad508544. 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/QZS7J2427769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253e4e36b68dcbe33792042a3824a7db2ea3f92252be7ececeacf9e5372cd492. 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/QZS7J2411732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa174e1d7260a50263cba9808a1fee3609d653d20bf3ca7ddc802b34d6e038248. 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/QZS7J2429177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3313707b6557b76ffe107d7075771fd6f237fad6190147ab9e66254930ea6265. 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/QZS7J2469804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b62c48e638975bc352d7954da46da6d874036216a6458e2cda778590b7947a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZS7J2478392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bec33b67295ad40c2b579ab22cb56d0d56f695685216d91bb40df17d06c767e. 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/QZS7J2459597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b33fad4f2e26559992d66d6f9984bc2d677266ac6a5f7ebff0420c43d5ec95. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS7J2439525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ba51348ac581ad929ec13b9b1594c98e0c4968e851d6775def7c817a71925. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:58:15Z), 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/QZL382501303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07c5160a075cb37bc786c4709d7f41efb8feaeee09e2d3a3bc4948d437fc14. 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/QZL382501304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8748f4331b15308faa5aaea88670326044f6b771519f9a4295386948d562c25. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZLL92533361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad54771f58315624d9c49bfccd83939a799d6ff5444a35ebcabe7c85b9f0af0a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEV2507356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ba51348ac581ad929ec13b9b1594c98e0c4968e851d6775def7c817a71925. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZL382501303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07c5160a075cb37bc786c4709d7f41efb8feaeee09e2d3a3bc4948d437fc14. 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/QZL382501304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2d5a699d5b26793b5e77efa4a6781bfc08a473a015e20814c167d022e22053. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:57Z), 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/QZS7J2548034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd64731c70e4b930c01002a8322bdbaed863af9a80b053d39fabbd4fa27bfca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZS7J2586976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11b41937677a36ab1983f4dcfbdfb3c02300c6d4d955280297d4aa5d6952cc. 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/QZSYP2549954.