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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa965a1b0ab9d527221860053a0d3462ef034aa981735e8f970db0d566b2c187a. 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/4cdb1ad8-77f6-4010-aa1a-28a4af9479f7.json and https://artists.proofprofile.net/proofs/artist/4cdb1ad8-77f6-4010-aa1a-28a4af9479f7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ad5de93b0776a9bd07498bed1e84061fa6d9d76934443b6da8faf200e2949. 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/USHM21983044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67555ec3d66db9a2afcfe17735f37400165766a4d928081f079e2ceedf3dfcfb. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM21983047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4dedf38f96f8a76165d45b37dd1970d25836d0cb75adc3f859854e6ccbc36b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM21983048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8abe8668a4108656ae9cc35d0ea425d73e3ed59f2eb79894df32247955ee505. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USHM21983049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574561227e09fcddbe3e4fb4eb99664252321986d77989a0d1345dbeadf33e7f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM21983050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d2a9e4d37478e19d2c705863d0bb5b033e14a870bb32bbaae37318fce89ca. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USHM21983052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071d1784b7decf676a06dbef7c8b95cbbaeff8c7607df15c175339298f23b4d. 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/USHM21982866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b745d98974cea7b3a4cbaac760b1816e08714470f3db8beaa0e2a155a2e1be. 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/USHM21982867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de59877cc59b566770f5058fd685f470fc368ed52b899ff6c040dfa5a3115aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM21982868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03abe246e01d847e136fe20b9d566e3218bb226e5a5ccfac10af4b58d8925a24. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21982870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1026e55472b2df3fd5feb2a98fa179dca59fa05012f9528be30d098b5ba198dd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21982876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c726cc9471566ada54814a4d0639b4d6e03bd4eee2cd783d36a9fc35de268. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USHM21955268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08e9fa9b4d0963ba4b1cc1bf7495b7b46bd6fd0b55f807cf91fe8c5ea40329b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM21955271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aadfa493250d35a0e75e8e681d5e7e4f38771443ee65108f236875a9a79469. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM21953944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f878f4f763c5eca785c7cbd623cedaa06266f24892db0a0dec93a64747d66cc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDY41754598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddafe6ff643d3994a5a5d5ccfc26ae6e0dce376112c7d264303dd8150e7e6c7a. 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/USDY41754600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9ab0e883c84e86d40aeda64d46d0d04455fb7d18c328b937b9840a2fbb2663. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/USDY41754601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa85aabab42f59e0a3521331bfbc03ecab571464fcc7ca859eaec8943958a41. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USDY41754602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef03eb7768c7a8fc07be000aa0ad20e3eff5bfd6d24474dc13584891c67bf5fe. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USDY41754603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e44888fcd1e832b94602a61fbdd38053dd0500c63fb909f719f305a2cdf62. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY41754605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525eeb2d5899a06528c57464ae9a4470eba89e42c2ad04a98a24189542b4e686. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USCGJ2064594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bba4e5d04b5df114d610133840712ada19b093221a4d9e5dce9049ac29880e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM6MZ1818187.