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 0x7601024502a35852d1d8d52aef6500203777bbb1111351302e4cbab2ed94faf8. 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/52dd8f79-a527-4cb9-a59d-6de1c1338294.json and https://artists.proofprofile.net/proofs/artist/52dd8f79-a527-4cb9-a59d-6de1c1338294.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 0x6ac73b2c71549875258fa435234076c7222838be4834438b09581de299b88d46. 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/ESA012026365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74753ce2be2687a43cf830f678a1960d3e8e1a885ae667db8b42ec9e6397b30e. 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/ESA012026366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34fdc637f1ced398607c1141a6a7cacdeb83ed26247f4aa82fcc235842dd69. 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/ESA012026367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bc28eabdb1c7cb282df8412a3a325878394fd05a88f57ff1679557934251ae. 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/ESA012026368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e3af8f03de350a9511c10c3009cf08e6fbe3e483cf0b93cb90a675d67ca07. 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/ESA012026369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb338f795c9fdcd4ed7d3c7890c0b1fc699d47fa6473759dc7f18bed550dd4c9c. 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/ESA012026370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883951abac53aed9ecf8290b5cd372b59e59c9db1cd2778fa791aaa1b94fec3a. 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/ESA012026371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2032664849bcb6b96f12773ba4870cdfcf651a6f48df6b4d90fc898d16ade95. 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/ESA012026372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b80ef0420f7aa87c30a5dd0e693eaf1cb5b98b82b8518e00d6af67d2c726dc. 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/ESA012026373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ec1b5a566b5673078e0ace008e3a54bc18e1bbf85002a2177db75f335d340. 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/ESA012026374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3690898a72b62326281b1fc4b6f8fa509f0a324f4f3702f399d781567c677. 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/ESA012026375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ffb5d1de6991f0eb1233acbc84189e429d93cc6fe25a0c3e65c5512c7e19e5. 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/USPQM2126401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e07d18dfbd0dda0d81458fbc1538554be261a557f84e8dbd070007695c936e9. 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/USPQM2126402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6936621fb8bdf7bd97b31cdfa92477b61419a7cfa2f1d9e92d3bc6c82d58ec. 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/USPQM2126403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e29ec1f4df833e84ea04d62a7425a6e6ac56b965e6d321bce30566beba8b1f0. 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/USPQM2126404.