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 0xd4818b0be451acb4005e4a5d8cf67e6a3d3d85ef293137702a99f3958fcc13b3. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f926b225-d773-4649-a3a0-c7c5805ca56c.json and https://artists.proofprofile.net/proofs/artist/f926b225-d773-4649-a3a0-c7c5805ca56c.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 0xc2b7c4137e0324b220ccc0a0efb1da7bfebd4a4621080d009cd163a2512b50b9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:36Z), 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/HUA5Q2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2585f2077071e85f3f9f58d16bf95e1015a1f8a098ca1245462d37107bd74d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA5Q2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7154add0f9b352bbc62fef4802bae7a3d2cd96add73e1c0eb81b8d9f3ddd4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HUA5Q2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4640b1f02704e10eabb95f081a53df58d774b6885aebe39ef89d9753ac263d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HUA5Q2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1388437064adca8a4cdf896aae2fdf1d10eff3be411bbe4c5d97e3175d6b99ff. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/HUA5Q2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f582290c243ead6b7176c742a3d7d9dd94854550fbeff5ca64c72f211818dbc. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/HUA5Q2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4841658cd3f9d52a9605f4db81909754a1579f102ad193c0bca1b5992a3d1cb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/HUA5Q2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797e62b9b4bb35f0ac1bb6d73cf9d1348ac78cd393357b8a4e47a7c1bce893b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HUBXS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed55130fc749f387fc55b1038d35fa4de74eeffae84cd5af3ff8b6c833d7316b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:43Z), 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/HUBXS2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b74c33f2e88aec486f1140078b6ade34f99f6060deb096f3a65c80c0b0ab99. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/HUBXS2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef445d76df3a5f4cebff399825b3bdff2315d2db82e2393de8608c32e3e546b2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/HUBXS2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74665a09f839890a9857ae4e65ad230fede0fa698e40bba6677b93e8db66333a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/HUBXS2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d5a4a6bc1d3f4316c37262350de1d947cd132dae04b8303ec5226d0d182ec. 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/HUA612102025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a158fd039fc332ea90bd14c8a263fef35ce28a746c6193183f8678a3625ff42. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HUB001800063.
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 0x8700ff83f7b32af09d4d1921764b93be25f7e51d1b65c357e81159be5ade35de. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/HUC301300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3500e3668f4d08b298b09e628d9bb4037d5ecce47d783d1ae5876c60ba4d297e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR2X42545263.