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 0x5f08268ed23baeec1df33965d542de3001f8eec275d2d532e0a68ec922161d4a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6713a011-4c34-422e-8aae-0d249993f1ce.json and https://artists.proofprofile.net/proofs/artist/6713a011-4c34-422e-8aae-0d249993f1ce.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 0xbb1ffd3398e1e50f3ff2b4867ece8b8686e504bcee8d2cd88255909332fe5a53. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJL2527165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ae3654c97ddbcaca47702cbbf0ca9e61349d1457014ed587d77d86af51b50. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJL2527169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b5ff0f00f90e3058318d2ddfd0a53b1c523a84db81f12ac137dff7fe5ba974. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:30Z), 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/TCAJL2527173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbed27548b22ce1514e67116dfcf1f165fa2ee563f45a6182cab4615e69410e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJK2527177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593601d7c38cec0ee46bd3d950b1a21b72e9d4fd3b5050fe72b412c85776396. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJK2527182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06702e08b8e88a62b2fcc399aba495151754fc5f3b1d317ca99eb41055fd4bf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAJK2527188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b40f4a0bf6b32d06fcf2f4556d2141e81ea9dcb7801d73f568d902e120d32e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJK2527193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b679299feb7419d669df99afbc6835580c182dcec600e4fd4c649c1e40fe3f7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAJK2527195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1cc9ac9b6aa20ebc1acd34da462eaafa27855bfde3ee0511674f17d7b228cf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJL2527202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec70b83bcfe9e51d6b9d3d685ec50193b9ef2bdd6f5f4b5a17d78d707c78f2e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJK2527205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900db48ddbe1cb2885ccf8b10be2eec9c20b6255428934f1311f8dd541d956b7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAJK2527218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fcdc8f632e748bc2c8e6bd41651660dc081e20aeae03a26b05afe5fbd6ce53. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJK2527234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5d96fb7e90d5ba37404e80a2cd9fb82d6af328556a48d6b14f71b6ab2fa6b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:01Z), 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/TCAJK2527240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ca214250f6ceaf5001d5e7c9fa2570429fb969aa7b47fc0b453647f801bdea. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:51Z), 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/TCAJK2527245.