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 0xc2b2831cb211cce45b55821a6692e1043ee8ec6181e1358c82c528e780953217. 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/de01ac50-ad3b-4cc2-aef6-17b91d3036c0.json and https://artists.proofprofile.net/proofs/artist/de01ac50-ad3b-4cc2-aef6-17b91d3036c0.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 0x46b84616baa110fdba2cec2dee0c13d2ec004d4a616589118544ba29799be2ec. 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/ZAC031600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faf28aafb8ad0e641b02b9d08f945b6b6ce7a9454bb6dfc46273fedf74fd4f3. 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/ZAC031600254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36003b5ba8d9442a538842e93bb76141c5d1e1a3fc8c0406c050a0dead7a8022. 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/ZAC031600255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdbe5c20d5def5aa4a38717ee58b4410e539fe720d26b11e0aa2108a3500cd1. 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/ZAC031600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3865c2afccdc116a9349c764d407ffa2df00c77aa20760bf773fc5af5f4097bf. 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/ZAC031600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64f15cad8d92acb11552b1fd00dc153ca99408e390441d42819624b4754f90. 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/ZAC031600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9780aee58686a7f6c7e30e34df5296d29a6f699745b5b65bc4455c4ac0df49. 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/ZAC031600262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e729ea8c31028218f8e9654b219490a809234609f0c42e7744a14514c77b17. 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/ZAC031600263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564db6758ea934ca7c5fdb20cbddcf036f30f57a7dd039871677321723417de0. 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/ZAC031600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92da965894e1c16c221ab03d6dab8d678ac98d38cb963c04f66df102b0ab4891. 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/ZAC031600266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c32994bd38e7c4b3dd5a375434d4096dde74bc7de13bc31fd181e3ae2cdad23. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZAC031600256.
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 0x6b3eb7dcb182a38cf451b12b66622a2e8cd1e2e39b515b9c6545d2648fe6cd7e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ZAC031600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810af022074d38312b89d68f2c2131b55472cdf69d30d84c438f86b01c17dba9. 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/ZAC031600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5accc76f08ac92cf9f8ce47c6d2c2b1fb11415e6b2be355f619b3f838096f76c. 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/TCAIJ2446936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c76879afbabd5b113f01d5184374ec3373a0433f5599e632a4a5dae805c4ff9. 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/TCAHA2394204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0732736da187886bdb5f18f3e36c6ccf86d71ea2855090d02dbe9dd9becf35d6. 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/TCAFE2046403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc23150408bc60392fd1831164a9b0adbf3a2749fdc7c246cd6f19fb4173d6. 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/TCAET2004674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc88a608aae115d18fbce2359bd4be0673149bd5b4f555589212cb376209ac56. 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/TCAEI1929426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17282d40babd28aca6c22da0b536dbbc40a2b0755e40de083f9c1acad9cba46. 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/TCAEG1975796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5820dab5fff0ed8f04af0efdb695917c306d8820726c1e1a3c0ada4ade84b322. 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/TCAED1945408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a2dac63f44f462cd4680adb92d0086fd7190ccef55ca7775f8e4969660ee9e. 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/TCADX1852491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2362ff3cb88c164d17f76310ce89fd757405c64cf02d684a30dbfdd522eb1fc0. 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/TCACE1577201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab61c636ef4c4640f38195c7b34f82c66fe6d5210c63902fe63bd1f47f5710. 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/TCACE1551741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a67a8a53373f71e7c6714defab0205277559065636edd7dc34f35c7a4c5cabe. 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/TCACE1550145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde05c44d4198e2bf49a2826c45bdcf45277b842db98e7730015d0635196e682. 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/TCACE1551717.