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 0x054f87c6cd5327a3aba6860d114d54129383cc27b4ba57b9aa4a2ca01d6fb5b1. 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/459246c5-725f-445b-949f-16e7e8ae61d9.json and https://artists.proofprofile.net/proofs/artist/459246c5-725f-445b-949f-16e7e8ae61d9.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 0x4fe0e15302172d268b6297ed901a62e25fdd8ec825c59ea40552d1ed9f3f57fe. 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/BR03D1903620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e0338accfafff7b08c670eea3db77b9457c6d154267a9959b9a7ddc1b1b1c0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BRKPA2000435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b8a54309a7d06fc16270b415755f483e12cab444fa7204e3c765129a222250. 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/BRKPA2000437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cf89442ec18965fe4ed77972cbf24494dab93a97027df090f93483c45b9951. 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/BRBMG9601169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6377b31874ff5a2457633e57aa6a5b34e7ab5d3ba00908e882d6d8575c5f1149. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BRBMG9601175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7ea9e23e4f8d7402279bb521ac9abf839dc1255368ab1e0495a7396dfb505. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BRBMG9601177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d3f79ffd933f0bebcfef32519c533fa6091888da5c8c00fe0e215a2622411. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRBMG9800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9918234b72bcc01567a7f2592fc9ecd1f4623f53432209e9062f0624ef0b3bbf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRBMG9800324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad19abbb97cf9a4166ad0b98295ada2492e93392dbe314a764c8da3b1ba219. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRBMG9800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3323fe426a9976e5cac31bebe3205fb146cfdda7a39bbb6a69509b24c5759204. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/BRBMG9800337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3654d5069a5b023bfa9585b32da651d0854b18af83152fe61f9e7e55b8cb68b4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BRBMG9900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c57814a327f039c777c93f5758a2d5f63cd1ee9ecec69d4a6a5578a7fe70ec4. 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/BRKPA0800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76803494eb0dd532b7438810f289fb3b268caeb371e10210da15edd2eee2e431. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/BRKPA0800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2923e3e3c9d4823b7ef4937af4503dab1855a8ed96900f97c2113d16ca26d35. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWDW2589549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1c834bb79dd235c34c29ee9b4f7a4fe7a3752d1e173073e99e61831e211143. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRBMG9800334.