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 0xfa393e178323a87ec6c1fc6adddc342bd114d3a5129b06bd8beb0550f9b81b38. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd224e5c-93ae-4b32-a102-728029893256.json and https://artists.proofprofile.net/proofs/artist/bd224e5c-93ae-4b32-a102-728029893256.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 0xb5fc75c1fb06700332bbda709fe21b65068e4f3905e0538f05634fee0ea080b6. 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/PLI361806920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d45ae73c0e77e3c5f32e0291a5b1aefa03bf979376e4956d61f6e88bee8ecdd. 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/PLS711600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59cb448bc4a3a4287c4ce725806911d5c1472eb695e69a7082994e20f3cb23d. 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/PLI361803860.
Jestem rozczarowaniem (with Mihtal) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71927e5869b223b12c2b8cdd9611193de9e2fe815e6e394a39b11457ad4b049. 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/PLI361803850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d293d4e2f688c1fec1af83d183f92b1c2936d18f9eacb40a1d1178e674154c0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/PLF671701706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2cd30767247dbb385141bdd210b7d93c9087011df43d5bd12b873d0b6c5f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF671701712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3b2e0d704119826075c9883968d420525bbbf20377c14c07912ff845d9431a. 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/PLF671701715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6686f0eb11ca6db7fca2031a5bac1281a8575601135ccd7e5ed0580c9a176a30. 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/PLF671701801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042aa4bcf80afa226c6eea735a9f9ee19c7f48e405dfa09ca92e38cb86bfee96. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/PLF671701803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d293d4e2f688c1fec1af83d183f92b1c2936d18f9eacb40a1d1178e674154c0. 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/PLF671701706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2cd30767247dbb385141bdd210b7d93c9087011df43d5bd12b873d0b6c5f8. 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/PLF671701712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3b2e0d704119826075c9883968d420525bbbf20377c14c07912ff845d9431a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLF671701715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2cd30767247dbb385141bdd210b7d93c9087011df43d5bd12b873d0b6c5f8. 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/PLF671701712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042aa4bcf80afa226c6eea735a9f9ee19c7f48e405dfa09ca92e38cb86bfee96. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLF671701803.
Popi****lony (feat. Eripe) [with Mihtal]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abbb852444164d3d2db9e8fefd6954277dbb0522ff87b83779dc91adc8fd870. 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/PLI361815240.