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 0xffa406aac8e0365cd7e3c914a77b09562e6b2007ae03027419e84d270d1ed0e5. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac9ff826-0fce-4817-beda-2b426ff006bb.json and https://artists.proofprofile.net/proofs/artist/ac9ff826-0fce-4817-beda-2b426ff006bb.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 0xcb9ccec24d439ed154ae484717c0931dffebc0855f1e31ffdb6ad0294d2084a0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGJ1010139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca9e634c96f60b7b20af29c95a46b10f273ac0b3b6aaadb6a30fb13fa4cd3b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGJ1010141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671a511a9178ca181131eb27de395951f70e10d859d26d9a3d9cc689ed8497c8. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/USCGJ1010148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f354c31cdc4c72a5034bb6b3818f69eb8ac8388f316ef86a5d74c555a56d5a. 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/FRYAS0107705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02842a9092fd367d4c66a9fdd41b2b412cbf94a1c4581d10265ea8e4cd1c371d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USQFK0910046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc923e305de8ee1bcbd47a93d1236044320f9aea13799922b15f85822071d58. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USQFK0910047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb037dca206624087708de5e9cec6c6b3cf10eb7ae3df081dc2a351a32d98bb0e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USQFK0910049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ef17cb6312d7cacf03840d303ddd5b6090c58f3f519a73424d059ec9600423. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USQFK0910050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcde517f7dc4d90b2b385cbbd9c24d566118bbd7114fc2c35c7dc044c47a173. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:59Z), 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/USQFK0910051.
Dixie Band At Buffet Cristina Montreal, Vol. 1 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24928de4e9ca8081ddc8f44332db5092d8cacaa9991794bc10eb878db63a14c. 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/FR6V82259179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e3576ae523219602b54a91402c3fe6b223b1ea3347de845e35d1d7656fbefd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR6V82258439.