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 0xb309c367303dce44dc6629b84cb72c7dd6a428247fbab800ded2e5f18e78eff8. 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/2ba7511d-52b8-44ca-b239-e89d57fad0dc.json and https://artists.proofprofile.net/proofs/artist/2ba7511d-52b8-44ca-b239-e89d57fad0dc.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 0x7f3875d96c0116e6864d797bd37e3833cfb68a2c42aa5061e0297634db23dd00. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USL4R2104226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8b8a4fba52a65cee688a3e82f891fb84f955dca96b24b4ec1b44bbe448ece. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USL4R2104223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23def3ea083f77fc4883c932832abc9dd6bacd4b37ab802f1debac6151d23363. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4R2123834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7669eaf0e481f6447c62e000e9678b6441130ea56ff1831c5dac49baadf558a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4R2104224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf0dbb7925858ffc3e45d1c21989ddfa4d9ccf51f62908e5b5c384862e16d3. 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/USL4R2104218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9b4c10188b164d84e248ba8f74d9af4479070109d03a629af6faaddadbac9. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USL4R2104230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a6467e28a84fff8f86670a6849b735c085eb32bd5070ebf5996b7868f47a9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USL4R2104231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff2f079fa099627732dd19694768c6a53fc90af2d3f10c0aa644beb69f2903. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:31:42Z), 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/USL4R2104239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db8620f2bb1dd792e2164760987e3d2bf89db594a75e813ecf08bdeb8248ade. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USL4R2104238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b21104722f7e17349696c77cdfda08e4b2776aae14c72b8c535bb17f93678. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USL4R2104237.