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 0xb2ef2a737e66f72f0afabb678017193910e446b28f60abf868fe645dfca1addf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c59198c-3a1e-4e18-9127-fc08b64f4d35.json and https://artists.proofprofile.net/proofs/artist/3c59198c-3a1e-4e18-9127-fc08b64f4d35.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 0x5cd725cebae721c685431697babcdc2bdc4441906a33679fce8067b3332751e3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:08:56Z), 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/DEL711980008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92635aa7b210a4484470f07bde39cc8a080846139cacdacfd48c8bcde62061a9. 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/FRX452031807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e29d0c218ba1d61092b5ea493dd8ae3b2322e3daeed8bcaac3e3a0cdd62c68. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEKF22001742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f81b622a5724ee68167b2b503c43af34e331ab3a18a45f5fa3bd086b1df803. 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/GBLPF2502707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e55210eb00fa0704910b152c0ca14e6acd08ec998623e25a7b4d0969b0f4d66. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLPF2509485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400bf423812451cc809d6b2d85a8922842e6b8d54c0cde92623f68b20a9e4e1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLPF2504864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb1ac9b552f0af9167a699b17ec11756165399ff06a4653983db3a18b66452. 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/GBLPF2512030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb0b8d181137a49d3cce7fbe883dd130ad4c08607cd2a7ab6a0d6d35746fc52. 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/CZUM72000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7d7f9b559e86a0ac2b46864b36a2d65c69cd1725d5a1abb88802f7b213e98. 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/CH7812198270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ce358be78f28c50def41b30ec2ee6597ab523a902d38e0e89e1af5eac4f98. 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/FRX762329729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9faaa7788d68cae34b3361870814200d1b9d34b6468dacef087533d861e8e. 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/CH7812060604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f4e8f6d240f333b95818efe3d712e2f6688aec0c5b5dbf460bd99b36401777. 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/CZUM72200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f4e8f6d240f333b95818efe3d712e2f6688aec0c5b5dbf460bd99b36401777. 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/CZUM72200145.