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 0x87b2e9ca8fc32e2d2c0396e68bffdfcfc8915f9c76bb44ec46a69460918b76dc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac1f20b6-7c6f-4fe8-a0af-86e91eb9faae.json and https://artists.proofprofile.net/proofs/artist/ac1f20b6-7c6f-4fe8-a0af-86e91eb9faae.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 0x8e6cc6f903e801e8e764524362f424f65a4ab4dc34f6bdbf25fcf2b06cb2a6b9. 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/IDAC52004224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52059a01946606185378a7e41a1155689526f08669832cd1384f4cdf5b3f5e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:35Z), 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/IDAC52006479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4156c5629c04b3207d3ec07901df14faa3fe68e20647bd15114b45406da1f0d3. 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/IDAC52006488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbc39a46ee5f356447f48b6e4da0939fbb7f9de48573a1f3f55f5c78a948315. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/IDAC50900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1283f7f66cb4641e66741df7cfcf9aa543766f10293e72f6c8e046393814f6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDAC50900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86866989cf8c7068223df389c12a9f7417ff443f63e73dec016d91aac50efd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:05:06Z), 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/IDAC50900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d20ef718b4e541720f4fee1ef589c9b886848bb68bf4c06139aff479585bc0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDAC50900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ee6889b9c1dbf8e40b355d3df17ef8ede82cf24e2a06f2d187e629dd4584f8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDAC51100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae108e52a885af46144cf411ce8a331a7b7d5506b22006ec14991933d615ba5f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IDAC51600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c3d95cc2fe2fd1f062d28afbbd41d8f1021286acbefe98ae5e5bd27d9deaf3. 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/IDAC51600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c007f66daa88cb11744cf8eaef219153af6e2af3ea45b0be99a262413ee43b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:20:11Z), 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/IDAC51600055.