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 0x8620326f9c974ea42f393d0f0cfda533deea82fb7dd37fb88d26d04ad34aca2e. 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/0525898e-d8f9-475e-b7bf-27454bc1d48f.json and https://artists.proofprofile.net/proofs/artist/0525898e-d8f9-475e-b7bf-27454bc1d48f.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 0x1d6f0d5d30b45d06cf8f09daf5bf4ecb279df2c155d3f1dadfdb48eb246500e2. 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/SE7C52300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9675682795d89997572930ac2c05cb834e311220bb64fc0fc30a55a855ea6257. 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/SE7C52300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d990880c1d7621894c8eb9c35d3f147888a7d231ffdcdccc3cf4216c1b5a467. 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/SE7C52300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14891b668acdf594c3d8bad0a6450f05e6d93fdae33b3ea409f0440147a7ac. 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/SE7C52300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb1ae4e8e79224e9734d2a32a684688887f6493ba5bcbe426de4c076b46933d. 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/SE7C52300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf556081335cbaf8f9079945d16d2dc2ddc22d95fba89ef0cb755d9b5c1f0413d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE7C52300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf556081335cbaf8f9079945d16d2dc2ddc22d95fba89ef0cb755d9b5c1f0413d. 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/SE7C52300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0da1bc19f1fbb7367ea95b07da54099a75ec38b651753c8ba302d6bbc7f1eb. 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/SE6TI2308573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb1ae4e8e79224e9734d2a32a684688887f6493ba5bcbe426de4c076b46933d. 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/SE7C52300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60ed50fec3db3649caad9255161bbd40d57450d60b5652d33a29af0c82f0e28. 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/SE62M2277903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab80f8d9befd0c148b4530ef7808d91fedd74b5654dad7c2a4b5f6993adce6e. 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/SE6XW2299046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a5bd1cd47ff1c092f5bb9f0e0d4a66f3516bea84b11142699eb09d6c32ecc8. 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/SEPQA2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727735460f02e0bb19b8fe0107d7be5c119e0cdbd1abb20e9ba0becf8e3c952a. 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/US38Y2403813.