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 0x4a887c44353913fed94db7ff927f2e257893c7901b55f40376cc8d5ad2c5c995. 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/88ddf355-f77d-4d77-8e65-e99e1c947402.json and https://artists.proofprofile.net/proofs/artist/88ddf355-f77d-4d77-8e65-e99e1c947402.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 0xd96b0a2f8753c5144e09a5e79436ad675c82d7f5018a6b934a28ffa8bf9a303f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:09Z), 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/QZWFL2304455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ebe98c41cc3f086249da2db9a30f4ffaee53b5feb075ebae171f8e435b18e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFN2356132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54db8c58d0a55ebde5461ffaae3516784b9189849c4163799a7c3823c0af0dc. 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/QZWFN2356133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfd5c5928571c2760bf4edc3f95d2842fd43727cbd4cd41b0e359a8294024c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA42469501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4944bcbbda63bff377000f8c8d743f7d4c325ec84080e02a5065d7ace08a42cd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:03Z), 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/QZDA42469504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8a3143dab163b6be6e2311bd9414246207ce1ae0ffff1cdc3c61c3401f55bc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFL2304458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b68abc00eed89db89c61fd6dd5063d73934aaa68adaeb1a499d1b8b5810931. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA42469505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a4a1e6cdb2116d8d8e51902dcb904d55528b6fc590a7245e69cc2016987d7. 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/QZES92443520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615f8af865c45cfc176be1b228fbd5286eb3b5f8418264d84097b9141e0b6426. 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/QZNWY2434046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e40b3ccae389454e8def86cd57470bbaa1ff6a2425afeb49935da8f6a980b83. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFL2304453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b182dbc13ecc249a1b9948131e366126fbb7a66170651d98402b9db5874d9bd. 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/QZNWY2434047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806caf1ee2b9e79e6554b22128fb2dbf33618d65693e85d5713f893feb7c48ae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:32Z), 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/QZNWY2434048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc085d7cbf22123490c9160b493a939bbc1f244dff187453bc4ac4210a1001357. 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/QZNWY2434049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06521a8131eb5c133ff56581c0ac265784d5cd5821bde2b8a93e2857c593f607. 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/QZTBC2412782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d0ab821fbfa23531a97102de543d3e72b6f7072b1df84d406ea04301b08b36. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZTBC2412781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0c9431fcc921f4853f4935a2ae410d0d430082d1378f3bf5145adc55955842. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ7N2480496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a09b91117a31874d76c3bc07f2372023e456881e62ca884150fbd73b578ad12. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7N2480499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20257194400a9361b818427e2d4b5987da98eb2d7d34f83537967961c942ba7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHNC2575642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9a09be52cc2efda47f62e348b028be7102aabec304cc250e94225b60c329d7. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHNC2575643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4292e954e8ca20b7e7f38ae53044f3763e0b1816798b7054c0b7a82920adcfd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNC2575645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641786f757eea5bab6bf6fdc31ce66b934a884741465bdb369ff99ad4f28cac. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2575646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf6a72eb7eb06280e858f1cc3fc604e5bd0855b4065f5c7558f1f066306afd. 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/QZHNC2575647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c238e717d5aa8f38ba33f4ecea08066292bbcbb434aa78cfe7579a1b8eeb107. 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/QZHNC2575648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b97c05b20ee5b0a8ce9b728c6cb1153db345a2c70df008cceaf02da1505facd. 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/US3DF2549960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c0b1963d3f40a9753f2af2de0ee72279c2b8948321ec21a5452f918282bf2d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB42596033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f2322770489eea369a49bb8f4c09f1fd572f3ec6e1a7c1af87452e19b01cf7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB42594005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3644e607bd2b43a5223d123e8821762d9a1c0c284452c562f966af2507dc53e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2548086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2223edf9b3c1e23cb9048975fa30180fbb04c09af2ffcc8df4da8c4da748e56d. 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/QZFZ32574795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531a1e833dddd6c0798dff2ee896f9dda00b08a9db55d1dcf92360e5036aaf1d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTBC2552626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c14f94beb99fb55a2891666e314be380402f7b36d57369c8b6e4a7ee10a0e7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7Q2595835.