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 0x4f2eddb76447969be07899144e5b41c96e25fcf7578f0ec97eb5ff35ec17bec1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97403fef-a442-4c1b-b23b-f3e82c84cb8c.json and https://artists.proofprofile.net/proofs/artist/97403fef-a442-4c1b-b23b-f3e82c84cb8c.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 0xfe0b1305f90eec82641c26e7f41d2e3f0a7225d50d4b66b424d9f6d59208c30d. 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/BXIV82244210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80bca8cbca026bf492bf045b024fb41c28076b7c42dbaab41f6878ff50f7f36. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BXIV82348988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd415b71c5faacda375d682f14acbd03463a258a3ee9d6dce3269042eeaac42cc. 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/BXIV82435855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d72fea271482970e3deadf61d0c77f5ec85a9b030e8a0ddf6bc684d516f383f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:56:16Z), 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/BKWDJ2500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac073020b96f194c49318aa93b919b0d1da6b190ca4b71c7117032ea711bb3d. 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/BKNU22400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d293f7bb1430f02ad00e3f7a648f0e9e8ed0bebc5834bbac2e5dcfb83f58d84. 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/BKNU22400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153186c489fe7c52350b9441655b0a703d45277dc7aeb0fb21d2659714acffdd. 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/BKNU22400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13068d539bb55d72e235728c2e9f3d69e66fee41573c93b09087ba0177dabfc. 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/BKNU22400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243dd0d686b51fa06486cbb8aec7115f0c23f510f6c047907ac4349db27c00b4. 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/BKWCM2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e199002f8443ed44d5fac4a196943b9c5df300c4902f8d7d6560668e7c64d. 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/BKWCM2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1643781759cdbf4d68669665b2feaac29d78530e0d3d6d69ad6be40ddbf16cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKWCM2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c56f4ebf385579fa6b432d6bb21a25c16bff674384196db2b3ef6864390138e. 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/BKWCM2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb219bb5d12620d00e900d9bfe7387f95cfbe39c22c864012b6ac17640fc58a1. 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/BKWCM2300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17476a96a2832245f700f14289e43de59f3f36f92f560c9108e5526e5ad308f. 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/BKNU22400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55831e27fa2aff84905bef0ab86d23aab9ec8da25d3ce87ccfd6869c3a9a2562. 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/BKSAI2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f9ddee97ffdd4bec144c17960f6ec90f29156d6018476afabb35a20504d41. 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/QT3F42442826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948711325fa482b235f71c5f177378612ec6479dbe5607b31fcf42dd6b5bead2. 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/BKWDJ2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f4e0ee88058e9ca6fb737a53cde0f83ed929fa624f55fcce4317afd476424b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:18:52Z), 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/BC3PG2305715.
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