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 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 0x13ccdc96696c31094dc0ac03d7943a295a3d5a922c23ff492023826f9bd7b2df. 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/a76f978f-4021-4c17-8a5b-65ee3638a70e.json and https://artists.proofprofile.net/proofs/artist/a76f978f-4021-4c17-8a5b-65ee3638a70e.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 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 0xd18c5db46c61a095c5aabc7cc1f16a3178c1243d8fac70d7f36a29774980d1fd. 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/TCACP1626209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c053ee0aeac40d7156a3444bac48d0876b706448c3f83fb843d38a03292c8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCACP1626212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dc2f15d118805a99f16fbea4c79da3ddc2aad1c0efd30ffc864d78a1b11d51. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA0Q1812499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b82ffa422debd12a86b5f0e2c6ac1129e9c552ecd46130453428c957a198781. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR59R1884227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a23e2e6061a59494ae4f541a58d58af96f7c9c0132557641684d715e8656ace. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADI1730672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20325fc666936d7f38cdfaabed3b51f65b401d960c33f77f003b10deb6fb487. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1884224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b82ffa422debd12a86b5f0e2c6ac1129e9c552ecd46130453428c957a198781. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR59R1884227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa160c83463fa514f92d1b0f732efca40cb52308f94537fcc13d9c1950bf79602. 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/TCAFS2105957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb364c9111ad54ce974d859f174cfd760ca515ed55a77ade1700c074b2e7a82c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZGLM2210968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9da6d4b1b0e2c6fd96030c72302222adcdf096ca54497cae07a7c21424a2d89. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX202292489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946d771a323dadfb90784d51e4397056ed12dadb5d86a5193cb2c4adb64b2251. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX202292495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafeb6d8c18a2e27725ca617ff16a304a6605867df431c9dadbab83d0bedb557. 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/DGA052328521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc1b91abbd3f2bbc96d9fa4701a3fa686a5b93612c652f5ea73aaf542a80e7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:48Z), 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/RUA1D2419163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf59fcccbad9012438934d3b03d5238f74c6056584d9acebb7237634528f41a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/RUA1D2440090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0218d2ed73bc489dbf37679aea0e02eecf8e0661b8bd0ffebc3a0c79317486a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:36Z), 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/RUA1D2440091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5bc2319bb60007911a3d76824ad2370eeb3028670281937591860b02b63cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUAGT2421640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f81636a452031d72e2674ff4d5bdea37d4afc2371f323e7f23ef5bcfaa893. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUAGT2467725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9181184cb6aca90265d1150f55a366df666dab2e5760168f907ea6d8a4b6ee. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/RUA1D2587326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d03075f48f3c2e08fdd8d80d0689bf3feecdb1d0a88176ad2fa3995dcf61d4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGT2555048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c5db46c61a095c5aabc7cc1f16a3178c1243d8fac70d7f36a29774980d1fd. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCACP1626209.