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 0xdc7f5a17802784ab5b806727d1b6629aabdde7707fe3141494908182c003211a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7435799-14a5-445b-808f-6d3f154684a1.json and https://artists.proofprofile.net/proofs/artist/a7435799-14a5-445b-808f-6d3f154684a1.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 0xbeb49073aee48520b20b81241d22fa43dcdaffbf1928639ee2f33f72cfdd494e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USDY41939871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be780ab8b51606e2f805a5db10ed6fc31f168bf2edb3fcc79d1c110dcff9629. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USDY41939874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4e8dd60b87252437b46143b94613a1a826fba10aa462ac4ba7f55995bb84b4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USDY41939879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b80695ea20a02d6036c2049642dcbd33bc61bb4d94765cf4868ddaeaa3eb5a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:09Z), 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/USDY41939883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735298dd02c78fa68eff204c7faa3c827896ebb0952ad58796c36dd2ca12022. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:37Z), 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/USDY41978371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e41de4a95d0b136178b1ad03a9b705fe64c36c7012fea3f4570b8a60056ca. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY41978372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9da70154a21ba4e8a6ec9c38c3feb0053ef6001367e9b97f19a328363bbe2e8. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/USDY41978373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa540fb0dc8478dd7cda97618055292d6257eef025af0e40fe0003f50372d7802. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDY41978374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe2dd7f71abe05ba9ac24ba14c21193e8f2045348995e7dc34cf4316dd24325. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41978375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4103c03ee5628b57d9164eabd7ededf466a517e8a273f1adc2d765125b7c583. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:02:04Z), 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/USDY41978376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3644af8088ffb1d72e9dd3bc6643303e55aa592669b0c993de33f4f3e43a6685. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:28Z), 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/USDY41978380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08e077d5d633f1186a2a863f916d53ffd52f52c7e989b3e179871649e243bff. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:51:55Z), 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/USDY41978384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b93d88d6860590190642e035d085cec287ed59ad50ee921ca043730a15448a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDY41978388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e954a3aa5e5b6868216a94a601c30b4f84fd40de9881c14fa83bb7a46895a46. 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/USDY41944393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd20c02a4120bd5a1a6bdcf3f1329e17518aa1a23b43dd7c766077c3a6a011b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDY41944396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2679e1a82b8b70514c7613a5b2d61ac589b6d326e9501b54c1ca8423b119a5c4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USDY41944405.