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 0x6ceb847e91905a6323a40f1061814b1abd52309c4c0647577c118600080a4fb8. 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/bac9b84d-50e4-45a4-84af-28a7c898c0fc.json and https://artists.proofprofile.net/proofs/artist/bac9b84d-50e4-45a4-84af-28a7c898c0fc.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 0xa3d2b449726857b95e51805ad7b1585d0888785ce4c7185ec277d75ae74f4b92. 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/USGC62000943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc489e5e78aef26cd04c2a7f3a25dca2ae8d41e17c7acc9f16ad2e4538d905014. 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/USGC62000941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2b77f61088b8dd8667bab9c150fe44d810ae09eee31be063c04617e931e050. 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/USGC61600871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f0a566ae21c4dc024fef9f2e577838431ac6a282830861c2fdd64ea692b4d. 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/USGC62000944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bf2d96e3b91f49e1072e4cdc6609bbf3f55464171cb71e494598933abc7072. 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/USGC62000945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e8aadc53bbb5f8d731b5e65c3f1323ceb66bce18c81579074f79455e026ad. 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/USGC62000946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb86d8f2d650626ef50343a87ecded33e680719988126c607a424e2558ce36ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USGC62000947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735e1a18b7917ac23bb29caf2f88bf42fae31df827c9b50666b9e4d62e637df0. 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/USGC62000938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be77efb1ac0cf589ae97b863e76fcb26f8e6d207693fe5831a7a21a4f63d5b4. 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/USGC61600872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0764d40702b297f393f9c09442c0f7fc9a16991c7a59482261d79d10ad0cda0b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USGC62000948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974953189cd4c08a10de1bde79b455c8b232a06a24b375c9cb9ebad08c850579. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:09Z), 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/USGC62001122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db0298487aed36eead17c001d23de85bed7e4d3e6ee609553a5d0871f95387. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USGC62001123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fae28f30ce8cf1a6f9455d054400c864c4ad24665219bc40f09ac75c69a9ce0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USGC62001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ddc9741e1119bda10dbb80e372cc1ba0e1501bfca2bec9b1159dcc77a74580. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USGC62001124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928ebb7562b253360197ba8f4f0d3c718f51f6b87b711180c63de82e0c79e76b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USGC62001081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa211157c041604c621d3cc8cfc3560277d67692466aa501ba1ab5b6abaa1655b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:14:23Z), 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/USGC62001299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60998b94ad35d8cb0b00d002a24b992b64e457fe9faa7e4f4efec5ca3d13c5fc. 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/USGC62001296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a12e909c80b8741a1b4291409b5e3a9053b3947888b3c12721f38cfb229a9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USGC62001297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61709a7fb773ddf9ebe90da4a88a46d42e150560a8d518e0079db43c0cdd5150. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USGC62001298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa211157c041604c621d3cc8cfc3560277d67692466aa501ba1ab5b6abaa1655b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USGC62001299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac775887b63e41a89e13a3b72f16724e46531cb18a0f69ec10131c9f869f3e7. 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/TCADE1733807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8926b909d43cd95148c21cc4b91e005259e6435abf483822d6e7cf092f01f355. 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/USA2P2046097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4352b1f99e62bf8e04ef49f83038ac7e140224cd5f476d65dd515df1974ef97. 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/USGC61600708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563464d23ebddcd001d9f3672872f23cc2c04642de48ee575de9bd4ccf6debc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB7GV1802314.
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 0xadd1cdfb706a4e6b7fe9da331cb5f67cc11614417ea6cfd1ad126368f0924138. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GB7GV1901023.