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 0x36d64306c0ce536a1751778de49456553af666f4ec54cf96dcac15fbf746c6c3. 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/43298722-c758-4c4d-b1ef-0d25dd1e10ef.json and https://artists.proofprofile.net/proofs/artist/43298722-c758-4c4d-b1ef-0d25dd1e10ef.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 0x4af9d7fd7eb70f7c64c718f1c9784db2a2a1947c351d3296617ba770cdab4adc. 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/QZDA61925603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac20b393703d7567a498703a2b6e877dbb2e18c19aecd861d6f4166eaaabf96. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:48:51Z), 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/QZDA61925608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba7c0f600e9320a2524af76fbfccd267d055a88f98c9563d0c5998803a9b8c2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:53Z), 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/QZF8N2125353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c5917e9b1f8b29917b8c325519f497afe248a94cf749260e009802dfcd67b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZF8N2125354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d9e06f6001c54d9c158b05b034f0937fa11836c9f2b9d64cae6710caf7171c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZF8N2125356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d0d9ebb43a951f6708642763811e04eb5662ae47e7b1ae8a4f940abf4731f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZF8N2125357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681a981a339db6a1d24967b75d69e0a9b8e50af7357af245d3b9a07013869710. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:29Z), 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/QZF8N2125360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c7013b9b480d5d256f1ea251e2efa3ab5c17fe48fc5a06d228911301252f3f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZF8N2125361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0d64ba5bfd2a5af8641f31333827df3d7056f05ba2d449e78b7b6dbc701948. 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/QZNMT2339505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c7cbb2023fbe8e40f59bd0148ba9e53a035cf5c9375b8ff082633ded36f101. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:45Z), 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/QZL382565088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ca561637c9cb463d82addbd9970e5c4b98577bcff811f47cc0bf79b82310b1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZL382565089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd05a4be0278ace1748a336f36f5805bacf03ae00e1aa1b73a59a0337545760. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZL382565093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875275268f477eb28242d3caf73fb3f969649df69fcdc7d242304f795b36411a. 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/QZL382565094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9620c6750add4d31eeee64d0094478238b2d36be5faa42c098cfaf8e533e801a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZL382565095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e8021a1571592ce13d31c09118445d6122ba9e1c70e6016826ccfc6e9ce43c. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZL382565096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ccc9347c185e246f2ac97c6ba112481c5be926d2d3ce0fb0cab1dca2a4ddc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZL382565097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122aae7e2caca790a5a5344d0dd79fc6ce0a9134102b4836da1075bba830f7f9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:39Z), 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/QZL382565098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bbf698f82eae2cb739aa873d38095150f646cdb6547e087704a29896897c2c. 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/QZL382565099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c93ff84b10a63f32b6241b86520ead680d59bb229d931e90463275796c0b846. 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/QZNMU2575663.