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 0x51aab3e1459c645a1d6a99ad35063971f9993ae31c93f9095213d60855b4b6bc. 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/3c02ebb2-90d9-4739-9f69-0bc46a0a7056.json and https://artists.proofprofile.net/proofs/artist/3c02ebb2-90d9-4739-9f69-0bc46a0a7056.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 0xa80949c836551a3c259a15d7199d31f36639153266be78828c31b34cace81ddc. 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/JPJ902012830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09036b37cd0141679437e7cac3b7a8bbc456eaa5e703440f6332ad4a98dd654. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPJ902103320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627cd868735704a50045660e9be14b46e629ebdcaf669fb10f3b4e2c82623ba1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPJ902100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e69a09b04186aa1565706c405a6c100287334b33016600e754621b5849d46. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPJ902012350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4afd4d907d77015353d8b91914c2db010fde61d3c4c58c2f0f0fa3000d0d09a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/JPJ902014070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe186e2f63d29d322d52eec2f94940c97954d36e575f5b5631007ca1f5c8406. 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/JPJ902103850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94639de9c944b6cc9f220b67c52990d5699a898097155f5bfdb7d4554b07985c. 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/JPJ902103860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2189ad84af9960b2b640724df979e82429677281e396f83f0089e974e93b5f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/JPJ902103870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2cc616eea7646298cd85e55172ef61d37e128bfb7984b3fdf784bbfcae490f. 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/JPJ902106380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83da6ccd30f2d7ca8b2f3903294136d6dabedc0a211142936de80a728db213ec. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/JPJ902110150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43e2962b220132777f038d594fe477d2a1a5f8b1c4cf60eea259fa51d87124. 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/TCJPV2323048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43e2962b220132777f038d594fe477d2a1a5f8b1c4cf60eea259fa51d87124. 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/TCJPV2323048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74459ecffdb993be91d82464dd061ddedf93c36df636ffc901084e4171c400ab. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPW2341499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74459ecffdb993be91d82464dd061ddedf93c36df636ffc901084e4171c400ab. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCJPW2341499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9fb3b575b28566b958907adf6f3b6303f2aaa5f50e6f1322312111ed03349. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPQ2106437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b970da37d0fa8ef3c443339059a9b311c3be3022be72cd7e68d21f0b045ccde. 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/TCJPU2210637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17220ffc31355c6ae62248d8a7fa9123b225814964cc86641e52e8172f1c00e. 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/TCJPO2119142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa415bf2d5be66e66e0b2bf3f6573ccc311b08318e13464d2056c9d0c9c8b8aca. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCJPY2485346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c261afb47ac6210c2798895ff27e028d474669d928a2fdd309e9e0e593cb5c7. 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/TCJPX2375763.