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 0xf00185cbd150bebf9cdfb5f8f726b16ecd52bf5cc617581bc1bbf1ca8b29de61. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff358c3e-a28c-4d31-ba3b-fad18d56b3ca.json and https://artists.proofprofile.net/proofs/artist/ff358c3e-a28c-4d31-ba3b-fad18d56b3ca.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 0xa8f58f1f605400a4b4dd749972e73b284117ac64ad80123d3b304728b688a4be. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:25Z), 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/HKE022234728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5bf7e2f5f1eef640b52e6ad4d0cad0806756c331b96e496c292c2fbce63006. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:03Z), 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/HKE022234729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc25a5b3b494175e0e1bd6bb627a0eaeb9cb11d142366c0820438da0254c93. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKE022234731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf80e2302e00cfcc7d4c1b257cdca79652e61c53cabdaccd08f818bf490f8cc. 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/HKE022234734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c904a51b0ef5362cb3ef1fab62176ff2f4c6bfcffe44dd2143d082723070e34. 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/FRS182158829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe051c4106e4da311442fe20a171b30f238bc76849cbbed9130cb85964aa50b13. 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/FRS182158831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44460acb7bf863b7a353948a3af0475dc3c28cfa66bb2cb2dba20c4f7d53cdba. 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/FRS182158832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8825a51b828dc89f2ef29096f471ff2917412dfbb8bd27e7a483d642166a9e12. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRS182158833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5220684645d0d3d664401fbe7f6bab357cdcf21e57d73aa841a4740dbdad474d. 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/FRS182158834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc7e705ca9871d6eec6e0b3223d6d590cccd92d0f226a435247b7ded742dda3. 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/FRS182129453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0988e552b1bea2ce4eb7010bc24f24e4d590992f9473b24b265ab61408512c31. 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/FRS182129456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf166d8535fadb23409c865782635b89d38bc0de31e5ca577d5934b6d3651edb2. 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/FRS182158853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37f4294b35cb7557fe87a34ac11be9c96179f5d571c44ffb4048cc615321e5c. 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/FRX282106230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0436ed7f2745751ff654ff7ad5bd01351f1a133ef0956880a94f2110164b56e7. 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/FRX282075250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1d657bf09ded817735a73739ee96a61ea18fb963d73ca8ccb5c9d84e57a62b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX282075252.
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 0x0510fba3facc0967e8c4901da8c21d3263fbdcd7512cd3be2a6ca92b28f0e193. 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/FR59R2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8739e9f4178fb2d7ae77a61a008665919d8bf4f2406035331ff6c5bf6bf0f. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/FR59R2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceebfa17b2d5a74351c34a649ad606c83fe5a9eb2beed5f3225b583482bd24e3. 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/FR59R2300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb63010004a3157c5da034fdaf0bb2394a10f2cadc6d7c1305b0709351cf3ba. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FRS182160859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13491d755aa9984c90e98702ac429d819f595a94258d28affd8c9b8f48aeacbf. 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/FRS182160860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0e389b5cc958d8469f0fed31328a7042e49bb0982a43a28dc4eda4b3fea89f. 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/FRS182160861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fad669988d8ba019faf1b8778a7cac5b1195d1a7617a378104f22c41c5aaf5. 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/FRS182160863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce1bcee47f4248e227dac653561344a744cd608effd35540d20dad21a55497c. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FRS182160864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bfa9c9a0e8b8fe6329a32ea763d7e1f27680ea2bbc126079db2096f5a5ef55. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRS182160865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82adbb9ba2b3527211bac7761f02bb26be8cedead32083200c68fd0f118e9347. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:39:32Z), 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/FRS182160866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cd9ef71e565029163df40abb4caef56a77c79ac37ea8ec109fa148f0aa7994. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRS182160867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655c6fa331de800db7c5a9bf5f9dd5582f12c5f79abb1add538f179bcc608035. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:55Z), 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/FRS182160868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b0832c7a922d40735ecc4b11af2af5f6347a11102fefce2f621377ddebb9a1. 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/FRS182160869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404e6b6a4dec8db40912dae144d67a8dcfc602353d1aecf48a965b4ad87267bc. 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/FRX202284219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a9eae87a7a220840fcd61f9e2d584fa7094a370e6c14de49d2335e63e57c3. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FRX202284222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404e6b6a4dec8db40912dae144d67a8dcfc602353d1aecf48a965b4ad87267bc. 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/FRX202284219.