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 0x65702b734da68000065fe1ac58914b0eefcec37f2cd1320cf13bc440d9574588. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db7f1a3-7499-410d-9cd7-4b966a3223fc.json and https://artists.proofprofile.net/proofs/artist/5db7f1a3-7499-410d-9cd7-4b966a3223fc.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 0x023d652878b7d2ec02d04b2a3845d0905381e336bff72e5839c9b48aa29a51e1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:49:03Z), 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/GX8KD2491738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e25c300da78e5c382934748791975a787975a5451e7f3f2c2d797a6ce40ae1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX8KD2403654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea21dac6431004304230c5ad35617d45b66c699136e49430db7641b31649b4a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GX8KD2494097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeba8d7e28eb6ede18173eb016a6b35350855a7e9f8174bb4a88997b505344d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GX8KD2451563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eeadb7ff152a754a1967551e98fdc18f7a918a446d28a67d3f7aa7b670fe0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX8KD2488450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3a078be961e23b35814b9efdb017690a3e5ddab51036fe4416f4fe7db9c351. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GX8KD2413077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276c000fa90ff9a93d1e1087e666b1fec78c36e083bdbd532f014371ae9ef3ca. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GX8KD2495326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e3a31b1d85dc70f2238934d966c1edb663b9f9b3ce82102b07a9c262c9201a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX8KD2405307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f621e4f82f8e015cc9f5707ed2d7970b08ef5c54a41918e47401057af64c89b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX8KD2466380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7514a367d6284678ee994100cf4af57c9b1cd3b462d64492c01a0478a6f425a7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX8KD2409550.