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 0xa080c5ad31f03c0c868368766e3f19732b065eb7d368ccb049df707f50a7937e. 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/4f417182-0582-418c-b5ba-5e3acb47d6d6.json and https://artists.proofprofile.net/proofs/artist/4f417182-0582-418c-b5ba-5e3acb47d6d6.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 0x261a0aa410137a5ca9551ccfa906ef6757b580a583d82d18a3084462433c022c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62155320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba7c698c86a61838fc60d49d574c3c66de82e18f45d1a95663df99f014589b8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QMDA62155327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4033462d6f3d886e992c63770722fe9be600f6d4be076ff6ed1fef4bddf4cd53. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6MZ2156197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8068b456934b84a6b4a33f672250ebfe5e88e38416914561ebf1e56d92132a2a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QM6MZ2155750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7224fc6f6376e9899d5b5edb366e6a3e790294dfb5a9b2b03e2a65db628daff. 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/QM6MZ2156926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e052b108c52d66ce3bcc3a94c67bc4df60c623d0f9a55dadb5655f82bcaeba2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6MZ2185606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0e153a1247461418b7e6963050d769cdd7e2ac5ef8c09b942dcabdb33f42a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFY2142343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe636492ca78d7ef523f911ba187dac28422a85311bbbff260bb1063f9efa83f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INN242300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f685b547cc88cde10fde80506e0d15d5e103c5edf5f55124f7c6fcd4f44a11. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/INN242312345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54508311a843c87ada0e15e972a3f5bf49972a8adadf8ff7d68c3dfb02a03740. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INN242319384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16004563852f5489798c8d95b60324354518f222175540e17cd17154dcfe13b. 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/INN242400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693a419fbd242f484989716e02c9ededebaf0ced6bde84da2632359bc20fc3f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INN242404050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ef05bff2d9775c51b624d33085d64dd418a77147e3ea362447113e1701574d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IND832404843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea722f84f30cc0247afadd392f86514374227aebea44c4cb1e02e943d4e3c17b. 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/INN242500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5eebab21f6990f33eb6ef9a91a0b5ca1057e83812df07173c260a1625bca9a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ING212521882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac4ae0f4c0f671d6b8cf3a9b998bd072bca43dda5ce78c19c4fafa44c07ae4. 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/INN242523443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd1577f2effcda4f0e9e39c0067cf3c62826c5336f30b5f93b905556933cac1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INS4J2301260.