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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640f89577f0591850d5b5252da41be85f4b4c43320c6f55779d9a9e3cc5c1f8c. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c36e5da4-dadf-4d66-840f-18a2abc7613e.json and https://artists.proofprofile.net/proofs/artist/c36e5da4-dadf-4d66-840f-18a2abc7613e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hradišťan & Jiří Pavlica & Spirituál kvintet & Dagmar Pecková (Live)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543aaa2b3c47c22f6b16fe9f7fba036bd50b71627d34bc9c13ffe0aceae133c6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CZA752053801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627a4efaa6b5ab6e8202c7ef09c7329a4e3eda5d98d7d79a59ffebe733992b0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA752053802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912eaa339203f2ddfe8c5521e4e23297aceae31f2738430fcf0fd716d5d3708a. 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/CZA752053803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965d295d1171a8c5e1be8eb9c5c59edab42f812a935b5da50b86811f8dd644d9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZA752053804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb218d1f2b56dafec6b61ab9e5b37785f46148beac04ec2aa1b3f832f084953. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZA752053805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7d6e6c902a5d8fa9f0cce89fe204c47f104ef0ea7c736d310a8f801e4a2cbf. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CZA752053806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232e8c595f80b51989ccd48ca92827dc8f77e40d27082dd20545cdcd41cd51d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZA752053807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1de2d6e582b10725098f89b9472670f9712403345a369f7180a36d9e17165. 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/CZA752053808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f7f609edceb658252b0f5a6ecfcfe826af91fa615ef5e591731b6cd2bf9d2b. 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/CZA752053809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a839264746ea36fec37f29edbb9b72f2c6b9fe49a50d7855fc60fd0d34f8d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CZA752053810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab10e45d8242e5a65eb0ff6180332de5a723caf6188432586ac3e3864f67a39. 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/CZA752053832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abf4fbc97f57a0c36fd1a2685fa7950dcede9b5faea0b9fc9bae58441e6af57. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CZA752053811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6da43de35b8d8b2e0a66eae7dac7868917b5051fa5a7ac088a4e92c08eb2f1. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CZA752053812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5824483067442f58414ce2e5c8fc0b31b7bee4873dced0364cfa1cf48bdc048f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA752053813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae4648b5a8e8f162733135c92b457359b2a50311a7a822eac2593f273b3099f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CZA752053814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929a7af1c43c38f4a526ed4d992dd3ed213acb1d6ffe3af6424f0b4f6c54ddc5. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CZA752053815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe715edf7ac964519fee3195714cba2503d282bbb54f61323bd97986595130d0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CZA752053816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce15c4f1721d7b661693ca257b778d2a2141a6fceb226395902731310d3547f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CZA752053817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9c817a68840417a844b952e5b100927469d46455997c0514fe5a65fb022568. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA752053818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7e9977c019b845b4c91b7301c4252e0f164dcf0caee455ae4615039e9fb0f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZA752053819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e35913f5e072e7b5eece914e59e19490609f78b8f38a27d9f44f40122525831. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CZA752053820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e38f7a6b6c937817ce77ec054a7a13c6f66f00e215b24d4d3f5332b31d8c50. 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/CZA752053821.