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 0x196487b22f8a3c0337f41a49cc83589ee0a9d32b6f72a54bebb279e0126cf9f9. 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/271e3f64-9d46-44d0-a884-bb731ece6d8a.json and https://artists.proofprofile.net/proofs/artist/271e3f64-9d46-44d0-a884-bb731ece6d8a.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 0xccba60d6d33ec6bdf01bd9467d1ecb44d4c009780779d64e3e158e2add7d7637. 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/PLF241603577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b679e211dbecac866112d4f1ea6769c225aed05e7efb042689aff9ed825a17. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:19Z), 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/PLF241603678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9d6ce0b2144a14644a3ddf9394605ece59edee1b9304626b5e78761cf8eaf5. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:05Z), 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/PLF241603679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0b3e20ff5ae6f2dbd2036f9e0dc05ab9fcfbe75e7e88c142fa3eb6f982e6e2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:27:01Z), 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/PLF241603680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb768e49cc59b83f0d7a0684005e5c581828c9c6d29379057419914d6e1bae63d. 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/PLF241603681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79030c277c215e1d24690c28ff3e8256c0c45a18a490b39d09ed6e312ed78357. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLF241603682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee547034f12a4db244a4d805c6d6c6262e1698757d339cfca1818e5c0aad8b. 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/PLF241603683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5997385cf83103ed4300667b803b27e1fc402845c7128a7bb17f8eb019f5b333. 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/PLF241603684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f40d22f5660dc990285136f689b4fabd498bcb86aa32408fd1d2b35f5f2a1e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:57Z), 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/PLF241603648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd502cdb22e2f5d5033880c1fcc004e95487829de52a84c4a2a4b7c844093328. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLF241603685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8df004f00376e72a5f433f35e7c2eb210c7153eb67ce0e17f930015450f4c0. 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/PLV401700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55edacf194fb4b858be96efa8fca83a79f94422fdd3088376c7916e9007301e. 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/PLV401700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4554ad924a2e24f7c8a80d6166c218b352a9df5684b26df0e9c3aa102a6b4. 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/PL70D1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7464ea4d4a9b0290b093e93928709d0c2c6ec72660193adee5579d85ffa912dc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PL70D1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120af0096cadc6c0e915a857f99c495221a808de34a9f2d5711911d42cdf60fa. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/PL2G02500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbac5bc78c632cd4977823b3ed9a85243343dce94a5528ff9baef80706d0d6c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PL2G02500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb522b6a8dce4e309cce5783c7baca49a2a96465a63021b66e2caed0565feb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLF241502142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c0945f9e11bb0ad932f89264db2c931d23d6fdbede359afa362f598989dc44. 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/PLF241602624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb830c0570156a157c19768d71faad09493021bea638c4753ea47487d6e05cc8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLV401900542.