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 0xac81840f597fb0168ca1b74248a0744447c17e1f670db6ca3a572c92e1c5bdff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07c4b20b-4d7b-4406-8d8b-2742e519bac8.json and https://artists.proofprofile.net/proofs/artist/07c4b20b-4d7b-4406-8d8b-2742e519bac8.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 0x84cd2b2145e2ca28aa4dbe46cdd5d5b207ca092877a940f4c141ffbe698224fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHO2330600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ddef367722239403df921347f3d6f21db784718c678c820eabada33d63fee. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEN2325638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5d82354fe14aea95bb88aab35c2094be8fd5b66dcd17d2076dcb230956ad3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHL2312122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbb74e1a22402b3e42e88d6787e5a8c018426256a7514e4f17d1f0bb7c312b0. 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/TCAHN2391498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f1da644d3ac4c62a8d0b6b26f0f01c70ed394646a5ddee924d38b608f098c6. 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/TCAHX2497894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7735cbabe6f8a8edef433eec0df82145dfd94d975fda47120c1c01634eb1a0f. 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/TCAHX2418114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618fff5e8ae7f8bf7d09b63a9c994df06eade30faa6154edf0a3a0252156b762. 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/TCAHX2497884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9961cab5d5863627abcd0530d3d7340d7519fd59b20ce3906f64aab7be57c32a. 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/TCAHT2449546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6094db864e10ccf4a474e3ac612246c31a7a6d4bd2a02be896e26e5af5aa7179. 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/TCAHR2394906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d6b6e87fcddb857ab7d856bc85f0a6711a21aba2cea50a7fc96ad1e46d34a1. 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/TCAHR2394918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c04257369adbb917cb40c94a1ca6d9438a46bda1bb0af62111d0d30d854eda. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHR2394922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c38e3fb7d040a7a9771b4d762bcb7a7f2af6742a78179827121b1891086459. 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/TCAHR2394950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cd2b2145e2ca28aa4dbe46cdd5d5b207ca092877a940f4c141ffbe698224fb. 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/TCAHO2330600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ddef367722239403df921347f3d6f21db784718c678c820eabada33d63fee. 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/QZMEN2325638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5d82354fe14aea95bb88aab35c2094be8fd5b66dcd17d2076dcb230956ad3. 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/TCAHL2312122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbb74e1a22402b3e42e88d6787e5a8c018426256a7514e4f17d1f0bb7c312b0. 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/TCAHN2391498.