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 0x22bb9d541e94569fb615f4569aad8a25ccd89439b633228a86f0ce3bc76c53c7. 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/df3d5ff6-c3a8-4ccc-90d6-7844b65055f1.json and https://artists.proofprofile.net/proofs/artist/df3d5ff6-c3a8-4ccc-90d6-7844b65055f1.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 0xe2f3408d973d45f2e8d48181c83d37939a0bb937d486ff873c130d0adb836865. 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/BXW6U2100007.
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 0x7c9df6ed51571787e8e58e89473aafb6d3735e3c48b237347e10e4aeadcce5ab. 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/BK2222300001.
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 0xc229dd55a8cf0ccf8515b72c03d47d169725627710b3cb79345f3af204f39cb1. 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/BRRGE2300591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c99dc66df54053c04613184cf15f062143d254ddbdf8169d47326454b62f3bb. 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/BRRGE2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c99dc66df54053c04613184cf15f062143d254ddbdf8169d47326454b62f3bb. 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/BRRGE2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514bed6ac875adab58f611983a3bda9093919c2fd4bae72659f9bfe4c25aede9. 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/BCENK2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab35c5a142e5bca9822b5a1d4b6ef4febcabad16cf8be363ba1adaf1cf96ec. 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/BCM9A2300107.
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 0x1e7e5f540de7de5e14372ce6bf8adca8589edf62d99857ca2bf5dcc260d5ef4f. 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/BKNDN2400014.
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 0x23c72270bf3d46ab4b0b1629f309ea29a4ca221c07edf10c7c13bb25749682d1. 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/BRRGE2102499.
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 0x0a6d7de14f9f96579f6214a440b218b4aa432747c46670f1e3aed4588fa951a3. 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/BKSUV2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1d608048ec476459e81e0bb96be9656082bad0085ce65afba0c22f10be5b2. 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/BXXCT2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f68bb9377eaf02d304e973d20c02465c94f7457a88d9851a3874034b846a0. 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/BXXCT2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0caaf9092427567deb4225c3739fd8cb57eab01f9258a26ea41cf8ebd32076e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BRC3Q2100024.
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