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 0x2bc7bd9cd0da9bc9b0d48d50ca2e304b8aaa939581f3186e2a6b8381cc0828b3. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77da1785-14f6-4484-a789-5b4049626a78.json and https://artists.proofprofile.net/proofs/artist/77da1785-14f6-4484-a789-5b4049626a78.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 0xc987065f0f54668be395f3ce3295391d1b2d261c6c8c2d645118bd4bd3d57f4e. 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/ARVKM1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d9563405f86439b7dcddf5e916c4e0e2b6185837335f46eeb5335afd6289ce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARVKM1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc87ba68befd898b821993d5ed69eaebb918aced1b2ad98c9399fc04f6a23fe9. 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/ARVKM1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5509abc116308365efc7e44a56886e002caf46b7d8694f28d776c9abb361e2a6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARVKM1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2aad9ebbe655122daf60c10e07ed989862b4fcb5c7d240d9746a5cec79895e. 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/ARVKM1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b924f7485104b7f5ba102ed017fd0e7be3e9979c2f8e965ab8756b200c0d35d. 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/ARVKM1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee8c90bfd4dd421bd87919b2518bd510e21976b1b98722033456f1d10bd8115. 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/ARVKM1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640709ba97a33d30bd086dccd221015a8ee713c8f56599dcb40227ef83b8b3cf. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:11Z), 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/ARVKM1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cecb4795afc22d9e08beb6626c612cc3b8aca9a52f29d590c55a54b1f24b3f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ARVKM1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64d83f42f597285d571ad8d8dd1ca0f7dcc2bad2ff466f5d15fb9babd9b5b36. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDY42306165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc987065f0f54668be395f3ce3295391d1b2d261c6c8c2d645118bd4bd3d57f4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARVKM1900001.