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 0x6032aea0fdb57d168234339454cf003fb6dc195128dea07b56f290872c3e49b7. 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/cc74fd96-a735-4ad2-8720-58c85a4625b1.json and https://artists.proofprofile.net/proofs/artist/cc74fd96-a735-4ad2-8720-58c85a4625b1.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 0xb068cd72d02147817965ae1027b07f005f2cff47d473e91820e268a422a14ce3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BXYVJ2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45594417d5e1be06a17a5cb6fc587635bd113a49ec9c42e80ee5df9e477fc8f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:28Z), 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/BXQP82100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c7dcfaf18690fd7472e415d46b8b53e026a4f24a964836e5732ebe360ec5d4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:30:56Z), 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/BXQP82100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8119498579dc4b28c14ab07aa3a94972c9f0dcf2e9da6c9e4315e37ccca662. 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/BXQP82200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c495b5aa2bcfd8268b7f0c5eb536e27773fea69394a16759024fb29572642d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BXQP82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3d9910c058fd80e895ef554b7b99844f70c402723b0030e7dd2aad4dea6287. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:55:36Z), 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/BXQP82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12257c1a6a7c4dfcfa442b9b5ea402efa68adbdd19653a900475c8d8ce27e050. 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/BXQP82400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54385cf3ea38b5ccf69cc25f99815b6bbfd7accc61629f84bbda8d2beb2353ac. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:28:38Z), 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/BXQP82400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55435363812e0a8ac09721babc690e3ffd17a35c7b81071570ada2baaef5141e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BXQP82400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff308735c4428e4489475197c06815c8075417764b8ed1775ac9c5674cff296b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXQP82400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232bd7ebd5f9153743ff972c6b2acf438b5b4bb3ac25332d7ed9d66dc60eeb44. 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/BXQP82400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07642bbe31991ec43bf7fea974126d06b6e8f0006dd05a96ca8f5d9913307cc8. 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/BXQP82400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd291c710617eec265609a71494323ae649d0409123fc05f8278fe81d36e4181d. 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/BXQP82400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85902964574f4329cde8d9b1e01dec20ce0ab49ed24d20d29c0b5fe7e53cdccc. 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/BXQP82400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e22bcbd1610d74d794c62e4f5fe397b7c8f67adb23f141bb97d8d6c8932c55. 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/BXQP82400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd2023e3dde5b119ba2c8f67c173c2e85035d70a28602f5d684b6b65da070e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXZSC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e801d12134fba4ef14d39d6f569d2fc084b4686296b82edf0caadf7af104c5f. 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/BC0UT2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9aad545e1597ab70181b89255fcccdbcf8a71edbea3b189fae8ded6549464. 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/BCM112100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb380b3927d82b652f0fa350bcb7f654aa753191ccd0822f106cc991b152db92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXBIS2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c5089285cd623ea6721697ebdddc4f3e6840f6af8ae88a5ce5b138c4df2d7. 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/BXPOB1900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1379a6c6f4286f8919943c516a0fd2bdbba0654a620945f3041a0546d802438. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:43Z), 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/QZNJZ2440467.