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 0x77903eeb3a5c9691f018c8fde84e4d24e100c30701880d35d0f653a00bb2b878. 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/9e4be72b-c913-4aba-b0a6-caf57af67ad1.json and https://artists.proofprofile.net/proofs/artist/9e4be72b-c913-4aba-b0a6-caf57af67ad1.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 0x81d409b9499126949c7b42efdabd5d8540c0ecd1281e65f22ce8b443bf65d45f. 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/PLI862000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e6242ab434a2ad00adbfd83e6eb71f1bbc0d3a1e68541d9d514f01859fbd5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL86E2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dad77057aaf7d0d821029f142143b3243328448592c37964a7af289268e63e. 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/PL86E2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f50644ab05da648d1360b7f2ae927a5c93d0ed3d460782b260e34e9e2a90ed. 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/PLF242211697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43230995a108594a961dc6f09717348786e9857a0dd769434d88b7e1ae755f99. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLI862000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b964735bbe653eeef0d9885e2a7c048fd722df11cc69a07b66f7f9ac31e76f3. 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/PLI862000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a17d71dfdcc69435c1586d547bfd36a0a7d026ecbbfdc5ee60208dbdd11d03d. 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/PLI862000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b91beba5ba218fa59779c713e592b924372751c40701370fc6d47aaf931befd. 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/PLI862000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d409b9499126949c7b42efdabd5d8540c0ecd1281e65f22ce8b443bf65d45f. 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/PLI862000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873b859dfb1849bf6ac80f06f1ac2c75dd07f784c53f5d0349b72a5f65fb8a2c. 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/PLI862000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664c68747362420a3b29019aa3ef41aded1d0844eab1b3ce42db0a778e82de21. 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/PLI862000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5e9bcead72e1f3b14a867a27677ee2161d272d82b0c90af60295f8f98c05c1. 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/PLI862000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b35b91ad91c145e1f31cd6f58a0af57cdf530c11b7a29e15f03e4ecd823c5d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PLI862000073.
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 0x0ac25e0cd70c3abb377155a11b32c5976848371854b750402363b5e5d914df81. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLI862000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f4ad07e6f3ca41ea8f40dd9e954673d4f8f93a77e8b2917f8988298fb769b3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLI862000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0101a1e3ff39c2fddcc0468588a5d570a4d2f2e7169ac6422c8e04ab646d4. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/PLI862000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ebbd8e66fd253bd0e54413f082d5cbffcffbd35ab0a488eb84968f8f50389f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/PLI862000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a59892b3b21b890d64796461695f290d6a21a970eafab3b7e7c71778d042396. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLI862000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0589739413cc57433a65f4782f5b893a8585044adc324fbd3aa7aca5c34dea9e. 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/PLI862000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f058992315c6f1344530c378bb5943c6ff0a1829ceead31838ca8d82b80267f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLI862000087.