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 0xc0cc802d7161db8d4eedf830062ea831ef0d1d47ba3be640d270da3655ba3e64. 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/afd68f7b-67ea-40f1-8311-2ee8919addf9.json and https://artists.proofprofile.net/proofs/artist/afd68f7b-67ea-40f1-8311-2ee8919addf9.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 0xc14fb9d83f00c48082970a7e0dcd9ea877c208d64494360f60b53e7643370066. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:05:28Z), 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/FR59R1554582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14fb9d83f00c48082970a7e0dcd9ea877c208d64494360f60b53e7643370066. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR59R1554582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ad56d54e712a9ab03a04762f214867c240aa10ed85f1bac44e39fad7fa2b5. 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/FR59R1623062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048cb4864a10c272a446a9250454e73a3164dd6a0201c4a8c12f7e2a5aacedd6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1623064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10199751d0b197f2e76897fe1c512695ca3fc105e6151d06e306daa097bec616. 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/FR59R1623065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e4aeffa3a39002c416a6470dabce7bc7398e48e1118aecbd4c03363eef8800. 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/FR59R1623067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ad56d54e712a9ab03a04762f214867c240aa10ed85f1bac44e39fad7fa2b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1623062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048cb4864a10c272a446a9250454e73a3164dd6a0201c4a8c12f7e2a5aacedd6. 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/FR59R1623064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ef47f4c65a21eaf86df08e735c813bb75fa53ae7852188634ccdbc9db8f7d1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:09Z), 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/FR59R1623066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db1975844213f805c7ceea104a391da95f2e1b000850f7ec19c2d4c7263c59. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1554549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db1975844213f805c7ceea104a391da95f2e1b000850f7ec19c2d4c7263c59. 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/FR59R1554549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54497dda81218d7c04aca8530eaabfefe2059d6412beebaafdf2210c538e5a06. 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/FRX871540943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54497dda81218d7c04aca8530eaabfefe2059d6412beebaafdf2210c538e5a06. 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/FRX871540943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58bb7c57c4166f3d32b96c74789c148f88d688b7762ee40112a21c017e4962b. 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/FR59R1620997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58bb7c57c4166f3d32b96c74789c148f88d688b7762ee40112a21c017e4962b. 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/FR59R1620997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e16cbbfb955c5c3268d3a572be1f129743121986e747eb97f2a4c4bf141692. 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/ES71G2428613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43179449e7afd837aa138eb776b3778d0e747b7a2c6267a4dc0774ecbb66866. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMDA62519234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2636b1c53f6b29087c62ad0a38071cbcfd4732dba6c9e66ebb79638e9473a9c5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:11Z), 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/QMDA72535566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e87af76729d63184d4652ab36f849f89cda3157825ccbc435d5079de6330d5e. 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/PEAM11302003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb194bf9359d2ff7e79964387dc819ba70fd4132bb42dbc461497a3c1159ed501. 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/ES71G1825311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6da28178786bfb1c28c84dfda3e3d0a1cf25091b331166eacc24a8159c87b0. 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/ES71G2409567.