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 0x9c147de076bc717e40a7b2e9febe10f787ee85bb87bc3c776ed3ffdfd827f48a. 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/759f4ee5-cdc3-4d47-9f49-c5c823a533c7.json and https://artists.proofprofile.net/proofs/artist/759f4ee5-cdc3-4d47-9f49-c5c823a533c7.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 0x0b8beed8be790c370c0d61225db9b15ba60a21a2b32b23dc7ea9d4a87dc500ad. 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/GBKPL2162464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0849c259de3ac1a2f425c376c89ea63ee8eb196b51f55f2c468b066b1d20a443. 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/GBKPL2162466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2521a5eb928db0e0c3d92c1f970fc8ffa988461ed6ed458045827f30bfa9bb1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2162467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a0317694d777c851090138a7b3845338f78b4f4e012ddb99e93b686599a0f3. 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/GBKPL1976994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c682108ea964c857427e2d53b570b58ad37eceae01078b7c54dab91e6a0e9c. 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/GBKPL2151629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839ab729c637b665519bf69693d823d3d42efc2a72659683c9cc6b282d8e9788. 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/GBKPL2150964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878144d6074c6ef5499a78a7131dc5ccfec88d305d9566405b8efa3012cc748. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKPL2150482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df61c1a7492d4b78f601775611ae1353b3fef81079857273480c14a992a1f9. 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/GBKPL2151626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8569d5505eb4e3571a936957316d4e62c109ea36c0fe5805efc501540de49db. 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/GBKPL2151627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811a713479892255f34208816ec46a5d7a9818f9a362de8a8c5e954ba6316985. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL2151630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a79e720bfbf5065ccd1e8dfb59ac5124c58b0f5e4be872fdd9d9d861441597. 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/GBKPL2084849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241228f401d4bb23d842845a6603c96b13eef90af2c373e29407f28f664a282d. 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/QZQAY2341971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f6a2eb770d734a0bd0dd1c3bbe52a1aa4b93cbd87483045c8dad1ac303c59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZQAY2318203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3626cb64489f59bb1c8e22de843571c18ff6e0ad9f890aaa7c8c74ee849173. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZQAY2351036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d53f37c95625e4f94b1ea2c3d3f56e55ed2bc1fa364de71aadadb00491110f. 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/QZSYP2257915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e4b9cd7fc926c8cd52243ed5a6b905a962123d2889d0323689661a1edc06d. 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/QZSYP2204224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928189d5273edb0d83f631bb156905e22b7989b96dc4eae73c6feaeb441c298. 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/QZSYP2231174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953e78dad4b3695ca4ec20ce3f96bc250f7be4c572d79d86ebc2b9837fa09111. 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/GBKPL2207889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b584857a8c52b8d371637edf35a7931b0ceef2e29492c07a317e54d2e6a9dd1. 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/GBKPL2208807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a79e720bfbf5065ccd1e8dfb59ac5124c58b0f5e4be872fdd9d9d861441597. 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/GBKPL2084849.