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 0x17487534b067a53d68d60179cdfd2bab2e4b74ab08824b2a232de9cd1b7e396e. 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/274d18df-6af2-4df3-9e0e-45bf8c422ff4.json and https://artists.proofprofile.net/proofs/artist/274d18df-6af2-4df3-9e0e-45bf8c422ff4.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 0x9454037453361b7486eba3749e2108c7fda105b2f6dde7f75d0d938085477270. 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/GBLFP2241639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7d0b94ebdcdd8f454b731db83ec169e58deb5d83b37955b51452b1712dd406. 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/GBLFP2258156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef2d8402608a82e0f12889156c4f17d6195b49b341f48f5219c5a42c1d6879. 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/TCAGH2210399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0571c2b501669f59f31d4f5101ac04753aa359f5050638765c4e60bc74970a19. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAGN2274645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6f0a84759b066595a67f38990c6afb7dee348a1e29c003acf46105899c18de. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGS2390724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37349f1612ef0735300cd8623a44c8c89e4c0d897d9459d427474ad098f608bc. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAGT2308496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454a2ae2a77af2d4f1ddf4eb2bb7820c067b545b1ddb0f29c2082d859e8940d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6K2340952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5250594b176494362dcbce06d7c62e66139259003d16975d9fc4a54920a6899a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:34Z), 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/QZNWZ2362491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3adb3118167c2b79a6001d2dded4ed3e77c4c8cbd568717b6d3c623c43f67d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTB72349289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2467c3b8ce52514a5a80bdec608faa6d2ceeae9a21e2e1cb05fc04b62f2b670f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:46:59Z), 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/QZTBF2364940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5262f7451bdd1dbc6dd859c708f528d5a406a6c7a211b45a10e715142268caa8. 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/QZHN72400758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad8443d7f953fe2e01d67e12e4343c87448aec469e011e7873dac5fc1ec0286. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6L2425591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f176dfb5a8148386faaea0cc0e513e5a41c46be436b0842e5b9dfa4230f9c5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ772506354.