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 0x8a61e4226ab67ee3380d98f90a1a3f8466e521157ca194aa917280017c20bdc6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05fb15ff-04a8-474d-8049-7dbfe1d9245a.json and https://artists.proofprofile.net/proofs/artist/05fb15ff-04a8-474d-8049-7dbfe1d9245a.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 0x2000c8d90c4227312f523ec5895d2a1e87ecfae9a60d1e02eb9b9ed51237fbef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:14Z), 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/PL87L2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085fcb5dbc53da2a39d5605d9c062020a50873bd82c0eabe3a3f917b95e18cd0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PL14U2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7753fd2457b2fc5ac0a5a5502745255ccf177498a361feb4dd6c9169aaf5956a. 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/PLUM72300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe0eb9a3d5681f41752d56d3e7dc07a4f185fb0241fda78c23c32349876e229. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLUM72300141.
hold my hand (na podstawie serii "Friends" Aleksandry Negrońskiej)
better on my own (na podstawie serii "Friends" Aleksandry Negrońskiej)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7959901b4eaf0acd9426bc8bdb224c43b2978f26b12bd10b15b8d838a0bf122. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL2DY2400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb29d3f801371b312411365e9e9edfa0e82cbc2037ef8ac9e49288e7891e2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLUM72400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c4f16cf75e36d079f6ed779808d20dfcd01c10146438e781eee724a43db73. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PLUM72400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6648357c15515a257e80f4c62721209607a5a358bff345a20e9cd527125ac05. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLUM72400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c489ebb079cf4481ea0fc8e5f2b0ec4be47deb722c8f30fb71fb48d706b69. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLUM72400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68d41eaedb8e869e7700cd05f052df30659292d9a4c94f3c53f27c34289094. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLUM72400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa23c280f0aa866af843cae2082d927c2625905ac1d8b09b5bd92c75500cbdcf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLUM72400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e96be4936ab911afdc66c478af020246c71c96f82ccf18ef2c57c679ac474. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/PLUM72400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8145cd899a24ca18cf3a750a2d72b205f46e4043a20fdb5775c7c95761807aa2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/PLUM72400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c4f16cf75e36d079f6ed779808d20dfcd01c10146438e781eee724a43db73. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:46:14Z), 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/PLUM72400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc689869e4e428f38389d04f6b48a146d56c2c8e6a151f0461efad51204cfc7. 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/PLUM72400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f572bd708837e0705cb3de012e0db1e29fff8edb64affc761619d992ba98c. 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/PLF242211700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ede3d02259f4ed77e57181553604d7979d7ddf9e008ec429fb170c1880cb187. 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/PL37I2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e052984c764efa69ee456a3024039aeeeda24e3406258ba34a7538600417b9. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DGA072295723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a2b887ef18f66fe9297581ee71f79726c6802911e39dcbdbb849477fddaab. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLUM72400285.
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