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 0xc836e159fecbc5b2bb769ba2b80b09accc77079b7367325efab37d59f1edd713. 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/2a26a5e9-444d-44df-abbb-ee0d3becd2e8.json and https://artists.proofprofile.net/proofs/artist/2a26a5e9-444d-44df-abbb-ee0d3becd2e8.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 0xafb306be8db3223052e278070cede24f1e2047b11138c78c26ae7f262d17cc93. 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/QZ5AB1869590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b37415adb2e426c0c7fdaa5b9c6a520141b70d308803004156b463aa662946. 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/QZ5AB1869593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb78b9280e47bc20bb6a8aaa95ccef14959b09bbb3a68fea1e61a3c398ccd4df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5AB1869594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d37a40ec74bb69bc4e4783f63f36700557c78a2829a97c79a1fb839f3453a4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5AB1869595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea41fcc8fea953b6b858d9bd50b56591b12bf30b0a259057c72f98f06af7a31. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZ5AB1869598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862fe6e483d75f5d8691992cb9b7e7a09c9e9286cee1b55b94591cdf48087e44. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZ5AB1869599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013bd4117a200a092a3afa2bc75f8c9955f20082307b78b7d9c6893a7a073d19. 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/MXD781904085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242edb8774ee31728d5ea00d72aed6a6a3240196a671fb96a9abd71043c2d937. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:25Z), 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/MXD781903966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78201417435c539a060eb24e92e7894dbb8ce4b33c294898342308590298e724. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/MXD781904881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa458a5736f7c6349ceafbbdcbd0f706e97aff0b3482d0d5e6d9ebdfd86e2f611. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/MXD782103357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6b028b529957c78c1eca744c61f70afd5aafefe9c3322b31e79443a3d00203. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MXD782002404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b8a3f3119f5dd089dec23bd2d38c6d2dcc925316b1a08cf900241a550a8a70. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:46:58Z), 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/MXD782101092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b3463b69ca619e7c4e116d1239759886cc1a1ffcc006df18b43290970bcb02. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:00Z), 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/MXD782103358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a528d05ec9421479821f4784ab0790d6536e1cdcb8a364447a1b8762043ccb7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXD782203199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a528d05ec9421479821f4784ab0790d6536e1cdcb8a364447a1b8762043ccb7. 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/MXD782203199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f6e2825d6c30c8e90ccb2da6ab08c913f9462df593686d5a6f846eecb62f51. 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/MXD782204001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc474890fefc35e0c5ac0f74b59359f35a6e28b8e2c239aa682ceff9c80133a. 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/MXD782300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc37b03287683d31cc5fe39634960d43056794d3d546d1d2449217733323baef. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:55Z), 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/MXD782302152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec115eb35f395fce7ba6e4be3940d283a774420e2120536a0a1f53f25aa5c03. 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/MXD782400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a528d05ec9421479821f4784ab0790d6536e1cdcb8a364447a1b8762043ccb7. 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/MXD782203199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc474890fefc35e0c5ac0f74b59359f35a6e28b8e2c239aa682ceff9c80133a. 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/MXD782300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f6e2825d6c30c8e90ccb2da6ab08c913f9462df593686d5a6f846eecb62f51. 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/MXD782204001.