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 0x7b0a9fbe2619e9d13d72bb18bf53ecb8753bb1784d579a21b2b69abb4f34b4d1. 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/6e19d48a-13c0-458e-8891-954451c6944c.json and https://artists.proofprofile.net/proofs/artist/6e19d48a-13c0-458e-8891-954451c6944c.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 0x6befdb9b0dee0e3bacf3a67689614993cff32413a3098249359fbebd7a20a549. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBKPL1975097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff60910b27d06771ebc6044c8dc144c194a608656952d79d454cf3ac9e86eeb. 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/GBKPL2084257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4915788bbb44005a2786cc5898ae9a5ee992c8e54d7315ec120bfd3ce750e47e. 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/GBKPL2035075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4555e87a790d65a4cd72b762d3934f7cce647f3b1ed2708bc29193f6b94e84e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL2140550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc106baacfa9f7f84b521c07e8fcc9c0ee5a1142f8b76d515bf7b9d954fde0ad2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBKPL2161239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5cf0505a8ca06c647cd7c7cddc9cb44ac74c83fd0409719b5a1423a0316682. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBKPL2168802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da04e4d17255e739055e47bcb38adc40cb029d321b404f56e2beb41da2fa1a. 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/GBKPL2177483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f744459a952ab479a95732e787575e11e0deb67b362ebbdb7d0ccb0720c512e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBKPL2294205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a9a7956e9b8d7454d7950ab51730912e55cbca8cb0b6917bb462ce3c24288. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL2206621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0431a51b014bd41a321b96b582341667cd1613dd1cc28ce616536cbaafe350. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMDA62295460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bd7bb726053d99c30e595cbde53812653964514ad5a5c2971fae0c2b1baf6f. 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/QMBZ92332345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc356247047c577614414b923fb8dd8cb3f6429b7500b5ad006ef20407ff4e7c. 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/QMFMF2316092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba53b1e0f4520947748857f932fdfe5ce9369dd4f65fed15704d5f098f5f137. 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/QM4TW2455555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2994634ad6378cf3913134a63ccf2d5b39f3cc5bb76dd6d0afbee2d4e20ac7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM6P42433689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7318400cbc02b2dcf625507a213e4821b195562301007c9b09cb191ec1b7f3. 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/QMDA62413100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c63e15f067334e259e88f0866ae4dd7d025bf415ca064da6d22938dd79a043. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72470988.