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 0xf4a5ce783d904240d356e322e34af54869fcd048691669243071bd90553ba11c. 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/e29a14aa-066f-43f4-bb0c-a3901c17d381.json and https://artists.proofprofile.net/proofs/artist/e29a14aa-066f-43f4-bb0c-a3901c17d381.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 0xa8219b8a7777042f41d8f8684aac0adb114ed5191674004bf4ad826e3ac82961. 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/ESA012139955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc64397cc9dd85f774030757f0dbc560d964498273bcab2cdffbad9d2f10e4d. 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/FR96X2190861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96929a97611dcb5aed8ec47e520d5ef0282eabc1bebd26d3a655ea34f8a5bc55. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FR96X2190865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f067961e9b9e2337d364f3dbafc3533ad1bfc9fa3f5c100dce604c0705ce0fd. 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/FR96X2190866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e4c2e9a5f20426b2524e22b86c37ca096d352ebf7e43477649ef085b3aeddd. 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/FR96X2190869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573716f297e46450dbc8e579928baeb47133588b223a3428f5f7bac744589db7. 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/QZGLS2474450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6bb55bae46a152f6627bcef36a4fb555d439292ad517dbf2f89cc07167edc9. 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/QZGLS2474451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd52a94e68326acc36bf6ad4674e043dca8748675fbdb8cf58aa5755f4daa88. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZGLS2474452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81643996d5e8e37985a08be66ffb2b3cc2f65369fdcfc650162164ece4064f4. 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/QZGLS2474454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9fe59d93b80e9ca048a364e0e9db11b56d86fd9fa9e9bcdd20e8c1e29ba46. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZGLS2474457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c95f0bc2ef8132ca4ad63798f549501be3560a88206cfc1f479e5ece68940. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGLS2474458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27b277a3ec3dc94b4bfe2c326af56c6e273f433595fced8253812a8b1201792. 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/QZMZ92435907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7cef21b9b1095812483933ec2031cbffaa015ce210d7d9c9354b48a3143544. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMZ92435916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437d4832f630c2d80f859a6a34fcd94d89871deb4a4e4bf3a94c95f955328689. 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/QZMZ92435919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edc5acac8eea75d78d26d453634ad399c7a9df2a8408a79107a6dc73a46654c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMZ92435920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc894abc18ed3fa1879af8e357342b14b28e4be8ec170a0eeb8107d59cdc5bb0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:47:04Z), 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/QZMZ92435923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9737f5a73a88fa8e4b1efaac5394767be918ec9f865b95a232a7f82a0ccab. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:38:52Z), 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/IT8EI2200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0479d3792eb5a9a8489459104b742b1523746674e4e4308326dcb551627970. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/IT8EI2200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899a57a9bf552c3b1083e4c1782e4a23e0905a5d2b1b2513a18ad49beb581bf1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:59:44Z), 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/IT8EI2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0479d3792eb5a9a8489459104b742b1523746674e4e4308326dcb551627970. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IT8EI2200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2633df814892d98715689f34e656a92c55f9cc4977816bc52f445dc00041186d. 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/IT8EI2200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef54dc945416fdb9d2e55dc62ec6ca2ef4b6156cda328fcda7b95ed58742cfb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IT8EI2200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c390e64b3a77489fa85940b9a4efab48d1be250c2e5dfef6fb3179a8510e159. 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/IT8EI2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793491a98104eb2b015b4d791bd12494e34cb96c9da3722d8f27230642f2f944. 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/QZFZ42501098.