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 0x365a2de7777d4583669707c560f69e2aae1eaab9910cf438dbc9eeddb21c4701. 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/aade9dce-32b3-42e4-85b5-11cd17dfeeed.json and https://artists.proofprofile.net/proofs/artist/aade9dce-32b3-42e4-85b5-11cd17dfeeed.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 0x84db1c6c54ae7c675840e1d88b3d7d4149d5d5fced7e2f7d3e7247b6683bb681. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBE2364120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384b252fac951fe200bc997110ce0c44afd6bdb8f84cd2b04ec09637bafc5803. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFP2310497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384b252fac951fe200bc997110ce0c44afd6bdb8f84cd2b04ec09637bafc5803. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFP2310497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b9928e2ef369f1171839ba0252b0784230c2a8d18aed640735268f93632872. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2496132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b9928e2ef369f1171839ba0252b0784230c2a8d18aed640735268f93632872. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA2496132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f2864ba18b76ef638eb4f4e2f9083482653a0c8a27b815695cc8e5d945b9c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZK6F2489631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f2cbc49de2fd4ab78471e7a487c8cfb25bbcb260881ca6985072a817edaca1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:24Z), 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/QZNWR2460011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed6611997f0ef4c409ec6b2e8ed08c40d6cd36a89355c6712f96db9a90a53a. 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/QZNWV2433554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed6611997f0ef4c409ec6b2e8ed08c40d6cd36a89355c6712f96db9a90a53a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWV2433554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3f70d50e84001558621eaa90ceb56a1d6d962f8770a3c3704203285f863d24. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTAX2485057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4da906d81cc55a404bbe31f124741ad7cb1ccba11bddf9739a4b050c7dc7ed5. 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/QZTBC2403813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b681d9bb014e8d1c580bd5082464ff611e1a68fdb4f967168285470f3523876. 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/QZTBF2419213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b681d9bb014e8d1c580bd5082464ff611e1a68fdb4f967168285470f3523876. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBF2419213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab48f73da8d8c90393f9d6f0d519407e40748579815b329716fcafe6b2515ff. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWT2579360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14443b95e627dd69a4de18dc3c4d26098845323709f772e4b16bc14d38e4f507. 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/QZTPX2542448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee938f5a8575d0e61ef214b34a1812037b5f792bfbd68a5d8d1c9e930074761. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZTVM2577854.