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 0x9a286ecd7ea34fffef1daedfdf728e78a2368816e15e8eca7e627745c299bc0f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fe4a7f0-8e2f-4744-847e-625b9ec6b0a3.json and https://artists.proofprofile.net/proofs/artist/1fe4a7f0-8e2f-4744-847e-625b9ec6b0a3.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 0x8608577cac3eb41730c47f98b710ae7e5b630b4627441da4b79ca155caa9d4e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR6V81986439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0399cd538ac358654685f49e4aa9b2a7b49b691351749c3834720882b22492d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:21Z), 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/FR6V81971611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3467c4f774882214404c9c316da7c2e64da8cfbf418db614e8c8115896bd1a1d. 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/FR6V81986441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8dcff57b689917e8804eeab6abfaeeed58c5483826c68813eec6e8baaefaac. 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/FR96X1653951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122840aff2b6d8882b986f09c735fdc57f0961062e6bf859ab2abfb305d63d5. 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/FR6V81954514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c8d3f0b9d82084ac3aa5031501c297176bf990a8dfcc779c8d16914710643. 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/FR96X1653952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc553b1b7fe66d5e46083bf463b2fd82e0eefe79c07234ec7f7841f7be912ed9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:51:58Z), 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/FRX201808829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e3945b996eb462d03f1a7933142f70a1880caf9fea2697126d824dc84284be. 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/DGA072143838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0149f3ab389e63083df3fa8d4adea431040873686cb3a4132912b3ae51bdcc. 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/SMRUS0077020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a92d902016a1985e7f9a545828f883b11f7b82768e9468abe48dd8432c03fd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SMRUS0077086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2e24955192535af86d5a823f2aa61412a3d896176404e2f5a910663c4d3914. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX282197457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a60fcb7fe5b5f49c3322f71f1d043bb2a5a77688c028f24de89b1402a8ad2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/RUA1D2323526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a9a87dcbc7cb492b2d9899a6a681802aa90b6458718a18f86e4c1acad74da7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:21Z), 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/RUA1D2403175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d5c6c9bacf06f7735dcb48045aede0750b9bc9d00594530615380c38b5732. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RUAH62416873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc862a9e97f0f9b90e1c2f0106dda6dc31f2de1fc864d607095a15207bfb83102. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/RUA1D2573269.