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 0x9117a0fbc4812e52dd906befb5ae6032bc908986d85134e2759239fa6991da21. 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/01ed031a-927a-4b71-9329-452d5b41542c.json and https://artists.proofprofile.net/proofs/artist/01ed031a-927a-4b71-9329-452d5b41542c.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 0x2838095ccf2918be6333804f438c4e206982ba1a669539ea45d12ad8afae9305. 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/IDA182132249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec73b7b98dc590de492e1abbb49f27a5df334fece87dc6b4aab9437368af7ab. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/IDA182132250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6188e56b318d8d00e1798944250e14cd58b6f82c32c9804da7bfc277f8cdedb0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IDA182132255.
Keroncong Session, Vol. 1 (Cover Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c45a79ee311964232fba330b96c51c66da2c8e6b2c689cd2fac64df6ca6bd9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/IDA832301279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe836cc359635a3b4a8eeb8fa5e7bfd7f345b9bde0ac62ae0d4894ee9678dee. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/MYLR12230028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14770d46cae152362b92c698e87a5ec090f4ed31809f56248d261ebdee7dce9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/IDA832108785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901ab533fb25112ba560a10a49dd6059dc107ada05afb1fc5cc3ea512966a84. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDC302113387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93450b0a7871cb5d64eec266d24efc1b617ccbfd6fbfeda5d62b548464b36437. 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/IDA182334758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8472bb8eedf5b286a2cd72a8ccf579ef3f9caebb76d1a2122acb3293433a08. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/IDA182334753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f0aa59f47537e0af9c1dee4f1969652687849828985e740d495efdc32e7f1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IDA182334752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ccbabf29364d57ef3c90d77f79a07c44a63495d148013cd3bd0386e4feb29. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/IDA182334761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bffabf5f7094cbc2c16e7ee706c0dba5468b05a29da23e66801421dfaa210a7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IDA182334607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54db773fc9e5944916e76ef9cc82e38e62a30eae4385be2ce8f5aa011e73223f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/IDA182334606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54dfb00cf2199b163f731015557455928f037b9a93319a05eb05f6d9c610448. 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/IDA182334608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fd5f804014142d6ff8f839a5d4dd9bb8bb2a228a97f5bcc9e761c508be1fe3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDA182334609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1709bc6305ae6cdb936de88af0bdc35a026b3f3e9ee980a2a00d30e60953476e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/IDA182334599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343a37378caabff108853c7aac165651d927b6d66f0660a5afa2a1675da6577. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IDA182334754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542737c16a961ec6a96ca525dfc59064b26e089d02f7ee8875af1206f2375e9c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IDA182334757.