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 0x62aac5fea47e2bc67d91275e8a42336cd952c2e4811e4d2027cad86bdb1f8c04. 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/a2baeef8-7623-4543-91f4-8e4b06f2669c.json and https://artists.proofprofile.net/proofs/artist/a2baeef8-7623-4543-91f4-8e4b06f2669c.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 0x7333d3120de2f99dee9906b15d2d58738b97a11049ce2470fd1aa66ce1cdef18. 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/AR5UH2300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947fc657e5e098eb06993e07d847f48f79479f224ba424c5cc16dd36febd33f6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZW9M2320879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad3550d396dddc41325bd30ff43af30adf61d9aaff8bf2d33a3eef9976d54e. 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/UYL842300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31e8b8015768aa101b7f70eb10e1ffa02ca706039d44503456a536f80869558. 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/ES75E2303713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e698bebeaec83cad2d572f192c533e433d30a91b0209d44a9fbafef4b1625. 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/SE6HN2359169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5f2f090e113634258a96a1eebb3fb55490c50e6245022fa0ef21668272dd5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2327507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd550484e915c448b705130c8f0eb728a543ad6f34e6bbdafe8501911d2bb4a4d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZW9N2269664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c2dc25820ce9f16571eec032ab89ed1dcfbccb67267800f004ee79095ca608. 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/SE6SA2287839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483e0374d422e9fe18fa5c7ae2e2fb3fa409f1626dcb41bda4679cb0a60c2ae9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ52257433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e843e5c5f1f6e7653f0eb17c59d1a9436777923f484793d4304617324390ee. 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/ARHXW2400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e05297e603f4a7360cb481a1f3726bd529e6f9089daf7b2639d5cb42cf40b. 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/QZGLM2429241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a12b3b34c4685176328f9afde4ac08f3a38fe4753f7fc3763329ad25818cd5. 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/ARHXW2401099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b6d9ed4a36c4a914c12ffe30aa5a0c509f72857b105670f0622fdfa5fe3f15. 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/ARAT92461158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b158544afa840670216a8e3c4197dbf2f580e454bd810940e16a238fe2da44. 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/ARHXW2401320.