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 0x04268f0882d2bb9a7304d472dcd6b1ac4929abef1015d9f19737c158c269d102. 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/5f04d77e-d867-41e7-82c9-9a3830352935.json and https://artists.proofprofile.net/proofs/artist/5f04d77e-d867-41e7-82c9-9a3830352935.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 0x373f316e4b860cdc14d43308552609a8b2fca2098c750d935cbdde8d776e1434. 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/BKBSS2400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ffadeeb45df304511c4ae949d6da19e82f897c65215281f5d9e3e079a03c60. 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/QZMZ92487685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda22e1f175d004ded1c92f93ee6402ca553fcce21dea53e429944faf973de613. 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/BK4442400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9ffabbad5ff71aeaf55993e2a68312efa4cbd53f01848e48b2b8393f3f3ea9. 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/BKBSS2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ee8e5fd7a6f8aa0178cd82813ce917e5996c9dba1a7cdc6680e9aa28247846. 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/BKBSS2300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1f69c3034710e3974160b658916058cf90c17f45363f77d1040af332ea6bf4. 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/BKBSS2300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf133a659c1fbfe1baf92d06b0b51cb021fa4f8b30381e58d1b68c946edcf6. 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/BXG6R2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07c7940873aaf48b52cb16a8cb1a0dd9d739dac7735b4d450eebddd6aac11e. 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/BKBSS2400705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feb7a4c0cb71d25025e8c111f5ced31954741bd793783d42820e5a5f098f03f. 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/BKBSS2400533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa037517ddd9ac94758c970aed1de8eb74e2546f167be934556484851b95bc6c. 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/BKBSS2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1e5a9f5cc5bbf62c52c30886c081e5e138e784d07aefa650b27c95ae39716e. 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/BXG6R2400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915da2554ccce17eaedb98737c8a02c500be5423d82ebcc4883888eb73169cf5. 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/QZNJW2404935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e124aaea10993e33efe72b89f4808cca50d2cb53a9f95bd387be2f2b8ede0. 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/BKBSS2400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946558b952de0215361eeab8d89d0a07aa1986bd8f2693d986df39a99d464115. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BKBSS2400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5889faa97b72a8ad71523997559fb9eb4e8dfc869c6528e32510b89ce5344cc1. 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/BKBSS2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35581bf7ef8df949584a57d261cee1f2f29c8869f90e068492cddf205fa6df5b. 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/BKBSS2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3665e49addb51ccd6a423adcf8f44762755d45098ec6b9120ac358e307055961. 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/BKBSS2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00531b9c6cc2ae2d15dd7de871f5790624dc83076292da7781cbef4a98529d32. 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/BKBSS2300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985aa7b438ffeac94dbf1f9e5df97bfb1adabd6bedf9000fa64ba6103e7adfc2. 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/BKBSS2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d756ca4d7a8a5f2e5a8657f4ca959cc2a539c7a8efc1e1cc569c009cbf75cfe. 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/BKBSS2300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b080ba61ab2963e0c64748f991e8a15d74ca04e0bed38c5ffe6ad55c04b0ddf. 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/QZGLM2318927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eeea05dfb87159c330b0626daa91b47030e200e03c3d85c744c7bfcfec38b9. 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/QZNJY2449849.