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 0x0768a33b3d391fa0fa177656ea8b53fcdb58bb161e21873d1e971d91e4cc2f3a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d17a34d-dffb-42af-8816-a412a800dd26.json and https://artists.proofprofile.net/proofs/artist/7d17a34d-dffb-42af-8816-a412a800dd26.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 0x400d92c58a1ed8823aecded6ed70acf2ab7bad19a2e571698a29b689221c546e. 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/ZAM142400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa571092da2e8e3d9c9cf625152512fe031d545f72ec751c08c93fec67e9b4c82. 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/ZAM142400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa42c23fb46d4c546659b318bbdd845ba7e5afadfc3c361ccb813a25d3a3d991. 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/ZAM142400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76d15ffa73557b75f76bb1bfc260797db62915f88c67ae4162de10a4183d59. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:16Z), 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/ZAM142400272.
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 0x0f355503e3cf6a6f9ae073d26f4e9d4e9c4d70b07d14f159f296cdef6cf1bb49. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ZAM142400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9da19a0a403573ae263c60a4ab4e43d670bbe777a7076967b1e6578a82b00d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAM142400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4445813c6fce1cb460391b8162ede8f926d78743a419d8ba0d4282a1d692bad. 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/ZAM142400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a6fac91f9ee2200294ba1ed276f1f8ea13cd0ee99f9bb89b9b164d09c37364. 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/ZAM142400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6bd0678b83852bdb65127b98f145bfa74a0d03c3d5e3248b09380fd1f58642. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAM142400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb275fcfc5be854958be36a6b801679306dfe38db97f094e216e2a99a290fa16a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAM142400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a99fc5edaa5c4f099dcdcde7ec24e26851ed9aebcac78ee0531b1dafe8b1ecb. 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/ZAM142300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e712b788c5215534a8d031a067e35579a44a3e99f7dec0eebfa8bdbc99663a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAM142300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13d72dc397f1b5b32c12a2672ada030704b6184afe6630041b3c5862f9d7ea6. 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/ZAM142300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7690d5c079f8e98b91e1b5ad57ed01e8db620def1cd330637fff558a64428b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ZAM142300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dc82828d296ad38ae2c857666d17d397a2b13897598fff7a7afdc042d4e734. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAM142300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9237fae9f3dc29b6e5df3295168865da345c70ab004b500d231a6881c41fd688. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ZAM142300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ee3753037df2de18930ca9273ff6132cf42b1ed68768533468415f13fa8c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAM142200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156f9c7c5354d64534fd797d39816528aae7a5a7d22a84fa38e49c00bd6c1c7e. 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/ZAM142200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82ef465f0b0597e05c76543e34f84332029c7108ab417d994ad179a86a4bf17. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAM142400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841cdd02ca6c863a98489c0f9d105e5978c586c8eb4dbc37311c6feb1f80e975. 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/ZAM142400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3667dafce47ac795fca4aa25ec1812a62e10a3c96df621df0f631debbe8725a8. 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/ZAM142300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fa14ac75be7a0cb5f0d5051a5b3f8fa4d5f1f268cd83ace8d2b4f2a24f1ac2. 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/TCAGX2372106.