thumb|upright=1.5|Pegasus attacking the Chimera with his hooves, above the hero Bellerophon, on a Laconian black-figure kylix, attributed to the Boreads Painter and dating to c. 575–550 BCGetty Museum
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 0xd258c69e7d1caf02c77989f0d392ab7298072f3c692acd2c9af95f8da36cf55a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4fdb4f4-90d5-4cef-af54-25233198c92e.json and https://artists.proofprofile.net/proofs/artist/d4fdb4f4-90d5-4cef-af54-25233198c92e.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 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 0x64d6926c58ebd2b8832a10f2ae8fe435bc2cff1d7482288e05ac39a4753470ee. 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/ES5060617901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858a12f31e4398dec23d50e9a0e5564c13deb30fcf5f19d972985fb8251c24cf. 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/ES5060617902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67a138580c3338a0fb6ca4a964616737710cc0fa15f1ddb01b3299e5ee5569. 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/ES5060617903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059d95f4968f9668b832def66d970a255fff494dc24d7bfad07005d5c17cd1f1. 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/ES5060617904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b11d3a5db5f7698bdd9ac2a494abf0c6550470368e95e30fa1ba5957bcf75d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ES5060617906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2c4540d5f4d1dd093c3903c810f17623585b59ff370ad9ed18c1e2978391f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5060617910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87944e5d47db6c280772e08483a555480785b77845fd7cfd663c036eced27b39. 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/ES5060617911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64207bb3179c402545791d5d712d95b836311926052cc905bd96ee140dff61f6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5060850201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa13614abcd873d01da1d9a631ef2c8b4e8cd874d22312905fc134974aab6a5. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ES5060850202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6add8926dac805b9e9e573ca0edbcdfa16e6a85196dbc328ee8056643ba679. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5060850301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7e350efd9b0931ac4fc75625b20cc3612452b08c48ecac22ebb13d03e56a25. 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/ES5060850304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1a0810e5f364b7d2c7120b20d46f1d81d6b957fbb0f909f12e132e393c30a7. 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/ES5060850306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e10f75f736fe7d1dda9ff073fe10741bf504a4bd2d9fe7acf70a32a70a42ff9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ES5060850307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99713a9736a2a4adc54f484dc5f850a923f34c6728bb2672d837f65a8d7a4d. 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/ES5060850308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef878f0c8f0911b33187956e71b86ba52204ee7aea3e4bdabd660b1981bd47a5. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ES5060605202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2420f5e8b6e6e9ac727267ad53ba1cf048743800d4b16ae3f46414c2a2d63e9a. 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/ES5060605205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370cff61b6e4e3678e598059bb8b74ab030508c65a7525bb8412895975af9951. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES5060605209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f46ee55a70485a0d9c258cb365cfadb6e9dfe38daff5b54cabda5b91bc4d751. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5060907402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b123199a96595f5a778d0c72f5427bef3e7ffc0871ed14a02391492548e25a7. 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/ES5060621302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251dcbe541ba36c6087412dc891fefcb6670ed4e53526d3719bc1e2706ec8f76. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES5060621303.
Comunicació / Comunicación / Comunication
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f4a35ce66ba0e06b182fd3d1521d3c92215a115e4d963dbaae066b6bae5e14. 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/ES5060620101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d1cda6fc52724a1e436d4e327d85c6d7ab6b913add266820403876eed2937. 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/ES5060620102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fd8db653771a22a91d1af2e4e9362256cb8514e7bf341d7db415cdcb6bbf9f. 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/ES5060620103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f2b4d8c0bed1fed76565d341cf2f65152f3fb8d94bdcf2f1c32a1debe50c1b. 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/ES5060620108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2b1dd099892ddfddd319e30050402e95ad4a2ebf4da66f2f35bd96a3fd3b8. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ES5060605301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f6e72cb62dda2121c628def8359898056769d06892230c6499c5e4da2de3e. 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/ES5060605302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f834b403425bbe7d8cb7f71663b2dd77ee16243e711af7c03d908d34a9bd1. 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/ES5060605303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc903bc1fc34aa52aa4b13342ce8caaa8d97127aea83ec25b43529f89f4e7b9e6. 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/ES5060605304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1298b284ddd12ae8bb6b96782a397137910ee3a0c40432a1bad6c5a7a9606096. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ES5060605305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15e9aaf4314f002f6c40222c47713f92da4f2b50518923b0594b397628c89f2. 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/ES5060605306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e2a6a10fc1148fc7cb1e24f04c69c9881f1a6eafa87c566560af216563a4d. 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/ES5060605307.