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 0x348c4a24dbec774a25f152590d4ff1250c9ff114f63e1b22905b5e02bf651787. 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/b3cd0c1e-cf93-4e37-998a-f8a57257a7da.json and https://artists.proofprofile.net/proofs/artist/b3cd0c1e-cf93-4e37-998a-f8a57257a7da.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 0x4d8d6548205a74d65503c0eeb36bc885c80dfc4b4dae2aeb72a53adb1466edff. 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/BXXCT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f7103ccc4a7480ff9176fcea638ccc3c94ffdb66abceefabccb35ddac28629. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXXCT2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2762581a03ad4033c6074b2aaaec7c6f0484564643a01d709c6c04579662d26. 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/BXXCT2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f2e3a0c1dff5fa51a5d6cfb2b72acb7ec29aaba582ac40d000a5beccb061f. 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/BXXCT2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f863aaff2adc1acaee7351a84ed9af90a60708f84fdefd1debbde320727b7e. 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/BXXCT2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b6d71f21df3f38539a63b50227f6996f829dca035a4e0f8f10f0efb08cea84. 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/BXXCT2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c07a12937e7798f7f221b834c2b8e763f5442be399c47ab4bdb041a62fa6c. 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/BXXCT2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60fc174c0dba3696810809f50259d6e19ccd8dd5464516a676f9e92cb1d2967. 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/BXXCT2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1485bad0ace3db5a461b061c7eb38933cf564daa030c9a36f312556cd5cc304e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXXCT2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9685fbdcb220c9fb04290f5d985074c3d7657cc2885508a7042846e71b19725. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXXCT2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ddc61a2e2b7609b667a0436ccaefebdcde428992c7cb700e3b15db6337f794. 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/BXXCT2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edea077b83fc2cab06f82967370dd028a9105aaf964c22898b5ca37613bfa56. 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/BXXCT2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7870e47951e300182651f7955f4791139a684a300faab76041c2a5fd173ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXXCT2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf736a482d1e74bfc20cbc510e8e27233c1e29dd3a45bd7303025af8a4c10a61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXXCT2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f207cc309b2d877c52ffb688eabff98e3791859deeae5da97dd95ea350ed520. 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/BXXCT2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ef511519c167e50334b7972e10c42644d9d247b1c602fcf842d396ce914315. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXXCT2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe2291e79421f22d24587a60127f28d5f5ce6945338a70f0991e316bfd28a4. 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/BXXCT2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62efa7288668986fcb77fa81359594a5cff72e39ff74c15fe0880da737bd417. 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/BXXCT2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1485bad0ace3db5a461b061c7eb38933cf564daa030c9a36f312556cd5cc304e. 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/BXXCT2200056.