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 0xa71dfd5c10e6a9b5ae1326fb83665851cec02c7fe1a906249704032fb718b435. 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/f8321337-4a0c-4f77-abb2-d2dd1349611c.json and https://artists.proofprofile.net/proofs/artist/f8321337-4a0c-4f77-abb2-d2dd1349611c.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 0xf44228801b60771a1158bd608de2c14fa3468818a1b28a031cdd1fd4d90bb68f. 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/US7VG1604332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f812b9577a07409cda364bc8ad481dccf10d5cd28f118f0cff7e8d486fbcb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1604333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e187722a0c79491aa88dbfd101de21ef401397d4ba05b8c4260493eeec2ef5. 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/US7VG1604334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ded046886249c03b24f5ab365bca545e98281dca24b7adbddb430ef314d1064. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1604336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777703d55f99a3381f0a14a3374f520cdba6c2c8112920e6726f8d4d533c18d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1604337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dab9745e35adaf373efcb29f3e05e5b683156a492491a10a101aa5d10e3942. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US7VG1604338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cd41d696fb1edb8925b1fa5d4c577ce5ea53f203ce214023fc75e43b1399aa. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US7VG1604335.
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 0x06162c976b5f6c6c63215c0fe267a2793eb42d62795a194c44d758bcd117a130. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1726972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae149f43a81e6e0c263de53c568425b43408534f4492cf01626870f0f3ceef15. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ES71G1726965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a4fda1e919ac06766a84d242976025486f31418405a095269d3297353a857d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES71G1726967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c3b6fe41e56b12a27454c5ee1923d5dbf64584328a3f26b2283a8e81a02e12. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G1726968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5358c46089c3a407ec253ffb43ee8bcbbc84e25039884d93d2311fce3e0749d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG2555752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64eb1497c00a186b38b3b6c14fa31f35207c7b4c47438406babc19ab323c44. 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/US7VG2588128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc5ffcb6878feec1b6505277a355d7564736fd31a81a8dc6db930847977efa3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNW72380110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f38693e54558c8aed257c24a3ccf49a01c517fd1dcfe6d4339d0d729ff57f2b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJZ2282720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79ae7d1797cca2b6420a39baa7af7b14259a850d4e9bdddb7ed787aca729d23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1612460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70446463702408695c3388e8aabf38f3673f6a1799f2735bbbb5669e45edbe7. 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/COC011329545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09669e97a79095d6e918147c63f9e8089e739d705684bce3ff870492d3116c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/COC011329582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa7b2cf0099901213e4b1426a85bd080cdd1c7e1770eccccea7bc26cfc0e95a. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/COC011329581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b260bc8fd313fab090d7d1160b6f87bfdbe082a21a592fbaad45aad59a1c5d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/COC011329583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad31a267907b7380905fd31e4e44995487ad2791b52f0bb55f075df371548795. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJV2306645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e61325b79e840ee6804287bc3f9880f07fb1fd67c4fe046077b448b7a3af885. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJV2306649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc04089422e775d9e0ca5749d2e08f825c2e71f6d54995447eb2b2a65cc496b2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNJV2306646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c24d7777fbb370bbb364c7221981a4295f353d4ed5384275d017ba8f0143ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJZ2266280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04671ddd0eec220bca97bbf4ea39c99994effb0b7f081c360ff242d599bacb1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLM2415335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9aba0212b2c54128f369bf950634e26f6c9bf05e3daf1f4efdca2c97cd0b01. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2415336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e9c2160ceace86a411a0ed98bd421737619b1a421d282428f26207eb38f74. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLM2415339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b7759cd06e159e3ddb19a8a10a5dc224307bfd6140b429b2ca760fafaac2e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2415340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde41573a184be531ec5e86e2334491f65bac21ef3f41e9490c609907e8b5091. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1671585.