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 0xd8a7af4b83efd99f01f3814d350a122b2d593c68eff213af697dcf408217bfa5. 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/0ce59f1f-04f4-4a1d-886d-6188ce5857b7.json and https://artists.proofprofile.net/proofs/artist/0ce59f1f-04f4-4a1d-886d-6188ce5857b7.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 0xda95edc11677b7a8fb705e3951b34a51e90d868929575bbb1f59f4011729c465. 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/SE6N62205218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae5462fbd2ff9f2356878eb82d2a47a296698ae34a709fec2d3ef7a92a138fc. 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/GBMJG2400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb071b1ccd39258ef03c40f257d9895d96263cd15283ce9074d9933a964fb96c2. 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/GBMJG2224004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85385d5daab3e95a96ea46326d86413396451ac7972286243037f0eb16ff58a. 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/GBMJG2210163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db43b2b8e829f9652f69571a39a6377df7a43152208e27a07194d2fb318ffb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6N62200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2b1da34c44189146979f2caa25b15c418d9a967095af9d2b5061c636985f79. 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/SE6N62100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d5ac023e696bb64eaa57df77141ca1532ed6669b10752f2b8d80a89d39fc4d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMJG2111075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534a41ead7c9e31c3ed4e0e4a1135d606fe1444bd2322b9cbcc26565c04bcb64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMJG2320530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0ac1764ae89826fd3c36cafc7272a761cf45e54b8ddd9d3c140e455804e373. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6N62207566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a592242db50c983e996016d1bf017c52c3b3ef1bcb4978dc0a9c1e4c6fc853. 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/SE6N62203148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb153458ea7751f6c5f9a2577bd289ef12385e04a0e67eade9615b1be1666aef7. 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/SE6N62200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f58773b41240d60ae821782ef1b8bebd9bee3a79bd2bf4e5816e768bba724e0. 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/SE6N62100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f699424e7e9fffad622caaf1be44909aa3286b1f13d32d77ef787783b40fbb. 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/FR9W12003781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5511b9c035e01de9a66dfa5c6f6ec55de21c36b20ce0821959bdb0f0ec6c9fba. 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/US8JA2212001.