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 0x020246b68e47a7b782e7de9640142dac53c5404430f8e1768b5e007c16185fa9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a582001-30db-49a5-bfc0-db5620b7eded.json and https://artists.proofprofile.net/proofs/artist/3a582001-30db-49a5-bfc0-db5620b7eded.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 0x63fe32f6e669a41bd75e2b6578fa7f9134fce63508e9d0acc3a72400af4d227e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:36Z), 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/QZZ7X2440695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1ad2ccd9054d3035b05422f38af30151f248b031b7c72478af749aee33338. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7X2440696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5155b999fc2065af3656e10bcf340637f8c0456c8376cf6163656891de926d37. 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/QZZ7X2440697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471091f2759e9fd213efe895176c1c8edf3db8e1c37db9a1be10705fb5661e19. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7X2440698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780b03e6b31ff1a3c4aeddcf5f59deb863975f20862910b61015bffe6f26ec48. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZZ7X2440699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39faab856b1eda37defe0148d1f1fd0daa54e513605752f36e495c66efe94828. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7X2440700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81273711e221eb8a03b104d8a151b84f0afb137a534b89428c8757daec3ce28a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7X2440701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5eff6c06c57e89eb443bc7d969dac846379dce55f902a362cacfcf5cbc6faa. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:04:16Z), 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/QZZ7X2440702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621b7591e05c2f0208adcc30f5828a5a3c9df7253433e6eac4513e2efcc170a. 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/QZZ7X2440703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957203e456824be74798df93cd040541dc234b5c43f84267e6b5fa3ce644f4b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7X2440704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8d57e55016811c9585c8b1350225fbd7f4701522d51fc9b8345ac46dc00dd4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7X2440705.