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 0x20b4167284ed0105cdfba0abab44846aa3b4c97bd902cfdb633241088c3f5ab1. 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/9c37d43c-ed1b-4f11-a723-afa3b1bdeef2.json and https://artists.proofprofile.net/proofs/artist/9c37d43c-ed1b-4f11-a723-afa3b1bdeef2.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 0x33eb7a6d12fe7bb9e626676482a29f4825b3823093790e0b352433a062064c8f. 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/QM4TW2117927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413833457626a476e5e10fc6a6a8d6199ca1a7b5a9d0df5e3aade12f814277c. 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/NLJ5U2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e863e9fa4b8a6093882a8981d7785148c40d0e3ba4327f807d481beb69394d. 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/NLG662000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ab70014c7c42c38635ef5991f98ebefccf4dc48ab6aabdfbf3d2015759fcb8. 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/DECE72500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e26dd4b89b0e5a3854bc7a3e7b82a12dc31eb717d667c615dda06edc62436ee. 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/DE1BG2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65656234046fdc3633bb138abe954af16498d8af9a4300f953568106ea3d1074. 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/NLG661800613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8fa8b19580aecd3c6263f34e84f45a3034c511e7453ecbf333e6386693acb5. 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/NLG661700544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6802b3662364683ed556f3302bc0c3b09a7ce7c6f399476a7aa2aa5287c7851a. 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/NLG661800614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5609618240a0f9acd22f280ec9e277bad6201a70b7ddc8e003590487b3b203de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLG661800627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8615701634f2875044ff6600d6ee5ad9b29383e368fdd489750e18dac5850b. 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/DECE72301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e5980d57106e61cc38561036ab77d89cee7d2f1b3f04f452681bc90bbc1b5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62226017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ac69a409d6da63cb6993444ee9c0767de6d2c96f3b6230c8b5bf853a97cc7. 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/GBAHS2100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd55f8c6f5aba80e9c5a67ef7920bb5b21ecbc38c765235e23299a333f6c01a. 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/QZMZ92307987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23addcb564effb42ce5fa96d69a94c7f0530246946174f378a8ba46941fb5838. 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/DEA622100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329878ce60e80c0d2c8b7c3a882ad88f5adc39eb0daf730127604d11ed188d47. 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/DE1BG2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a72a5445adae825e5bff430dea9c4cfdf6128b3ab24ea8acc143ab298ae7cac. 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/DETM41610654.