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 0x7affc2cf0bdc2018e1ddf021807bf59175cf9e709a669f55fa36b4403008f4b3. 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/136e6504-647a-4774-b217-c55ff9644299.json and https://artists.proofprofile.net/proofs/artist/136e6504-647a-4774-b217-c55ff9644299.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 0x7e262e8786e5da0f31c41726cf8f5b8d0a3c8cddf0276ebedae21f9342b9aac8. 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/TCAEU2012310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d28af68233c9c2e63a7e0b2f35dc34ae4bc5d48d310b2957ded7d9b1179f1d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEW2005913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee88f3d920dcccaa9905fd6a0bf017097568bd42a7fd244391e732556c81582a. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR8Y72100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a58d24e8ce7f886a1e217df1d4a61cc4fa8a7547cd5b5060b3e25984037353b. 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/FR8Y72100417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d1d562bf9c6de366be31d0a17ec54fdb9a52407aeacf6b8eea7d1d0912146f. 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/FR8Y72200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4d9d3bae3dde8eff3d1ed3a395e5d94077c51bc6cb1472814be4a018b8bc2. 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/FR8Y72200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e45033a67ffe169a0ba68f700c6559967beaa7baa67047d3f1fdec6894d53ba. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:49:59Z), 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/FR9W12371496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf21dd92d325aaaa43ad259d00390e7e0ce83a8d0bc2eb51cdd442dd35a96ff8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2MX2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4de1f0cf1342d3a0f0018be44ac32177b0f7fd85e7296ff99a7fa1884886337. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR8Y72100239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3448081b6b6e3add72e7a39681b51c2f1458a90055bd93a0dda67f343a0f5af1. 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/FR8Y72100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cec8afd6f74194b564af0c24b117aeae57b788a7a2cc9555b972935a45a0ca5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR8Y72300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5de2880cbe663cb749ed6f222f092628bc06998010465e385fdecdf2e8ba51. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762125245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743e45209c7057ec8509055720a74b0966bc1c952bf3398c50bd95556f535ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8Y72300122.