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 0xd319ff158e5788d78a6154b556e0b8e9ba60d8c27f14fa367a1f8ec8dd937fcc. 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/ec11b147-35e5-41fc-a6c7-e228408c1a73.json and https://artists.proofprofile.net/proofs/artist/ec11b147-35e5-41fc-a6c7-e228408c1a73.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 0x8348c279095987f774614650b90f528e9b4ce424291db1ea6e417ee16a9f2691. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA560941004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9532e0185e0ad7a829c5e55f05c02e8e1a6760441aec5adfc229279905f6ea2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA560941005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9be72b4420989c6e1088c1708ba66371ca4bfe19c797a9c511f7963a8d671f7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA560941009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552584b3e33b21aed2ee9c3383aa5c6dc216bef7aabf15bf5bdc0ea6034c7d8f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USA560941013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f1db94f0e2db62af1766882760ee888bdfdc7ff813c6f0c1f940ee687e7c5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES21A1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b4f923d298f7c80b8c2a835ce170607bbef89302281b8fd658efdae54483d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES21A1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93189e5b143f3867e2f4396ad457af35b9140b633d85c06014509ca46f9c3934. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ES21A1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c442a07244339a1ebabdd01e7e3aa3e837acfb2ca035484e866de4e0cf6405. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES21A1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2f20af38b7628c154888c1d0f2dfcadb8f0e5eefb92afb6e945eb2eae482fd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:11Z), 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/ES21A1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bba0c35fbb1a8d01b6a2b06ceda9dd751a27dc5af49d4a28ca1f5dc1b48d8b0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ES21A1200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5360c6895bed4beb6f0046b830d3358345eb565e925a8128223114d4f45b52b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:21Z), 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/ES21A1400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28646a51fe71a8d661bf01b7e6c71493df69100e96fb62ecbeafa3ef6fe2ae38. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ES21A1400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c049a4f414c86c450074692073ad95e878877a32b753537e80c98cbb6b4d0d3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES21A1400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbb18c2aa7a8f3fb72471304bd19fa05abdf2c282cf396200719c62a7885aee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:25Z), 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/ES21A1400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe51dcb90e2f73c8d4f2575eb1a2a4de21ddff3420d59cbe5990c0a78ea165c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ES8241627002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7971f5f8e0214a4c1d3caa0df7e46e1c7c0112692b147c73be6d93d2fa5c14. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:20:44Z), 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/ES8241627006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0880802bb77a7445c8070035694395c9b27b8f10d0996b14661c4823b22b9f23. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ES8241627007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0594d0537353a1caa911659e50dc870c940d792e61cfca7e52d52491fcc63b72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES8241627008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c16749552f9088044819809ec24e49e49be42b10a9d2199d8e6b288e265381e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES8241627009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa000f62f0ebcd4820cf2dca690ee927b9cef97d06d801855159c863fd6fcd2c8. 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/UYM121000531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd69602458179c9004b146510ecf0b01607be7dd148abdb360ed90efdc99a97b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA012557396.