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 0xbc332d3583287a7e7628937437c4da74a941503716f56733742bb0fe22f173db. 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/9bb72905-f24d-4e7f-87d3-d98f87214110.json and https://artists.proofprofile.net/proofs/artist/9bb72905-f24d-4e7f-87d3-d98f87214110.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 0x98d578bbfd0a9425313be57221e10d5afb997352ab927ddbaf670622e4a4fd36. 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/FR2X42442321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c127134d639ed9d4c7b72fb193320b41aa2669a9860cc5da1d5255444033c58. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2421908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117c7a37c413e34df66691042d067b62bf691a83adc0520095e21b11090a9b6d. 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/SE6QE2331095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49838ead617d165779caed5961e82fd70c068df09574b85b74e6f03167e34cf7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBWUL2490226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456bc1738ffbc2f57f696e082fecd997ea22a182ee39f116ca199610ace6ca36. 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/SE6XY2349543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b58e1deed2d9d5d7f35a291ec9b7cc796462f093a974f7604c639e7343d64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BE8LH2400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572d5010a7cfa37fd2ae63541bff87c2b10738dff91a9018daaa3f97bd05c1c1. 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/BE8LH2300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee740c8438cef6253192d778b49683f31416c8f5d52d461d1d16aa2ae4971001. 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/BE8LH2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f11f6ec83f9254b12eecf90e32004e278bea3f92ec4b967bde0c1e1d0e3402. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BE8LH2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2b24ee0a88e1c407413fd1b50cfee64ff8eac48cc22b5fb4fda50375d8de39. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BE8LH2300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10564a134d012fd736eb941db75f10206133135bf4e87c1b3718fd3a71526a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BE8LH2300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99974c20359c5f3c74ba40e9aacc5f8dbca09063b07fdaa8339b250443d49eac. 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/GBLV62309841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6073e22609ac342aa4be74f76f60169e51cb8bdc5e97931c8aae7514ad7b2d. 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/DEH742407549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822fea1939c0065f4fd25f5a0847f4e5a791bd4846e949e4bdc15742b9f8f4a. 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/QZWV32352250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c65b02872eac91de1f349338894d6c0d7f399e86055ca45e0e82cc72191f335. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BE8LH2300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421e98dcf9877c088935f7ea9bce146f46b5308bdb7fa8778c607413b8442cb. 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/BE8LH2300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30cd12767718799c47c1312779609a5fcc946b6143ebfbf0145894ae7790209. 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/BE8LH2300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce32da8ac8bbfbaa8e13c7ff21e895fd095d3c863638126279c8a2d77180788. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BE8LH2300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f14f43b44112c4bd8152d3928a54a374c323cb621318a0aecce7028d42c2b. 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/SE6SA2336413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8306fd900593f1dea86603229ef6644384b4ba09e47bf8af14c958895ad145f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6TI2360770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c6aa4ffdede082dd3327c18d8b1e967d5b8997774bf2ad3b4188896cd974aa. 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/GX89G2333761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1111b7432576f3e5cdf55ae5fcfcac8f960debc534348bf68e4cb2c19bf74827. 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/GX8LE2384190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421e98dcf9877c088935f7ea9bce146f46b5308bdb7fa8778c607413b8442cb. 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/BE8LH2300279.