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 0xd3136b7bf799e5c6032679f7b44eaf65d1d8ea97f9c7c9efd944039e24714892. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35bf3d53-6f4e-4969-bc72-a943ef3cc906.json and https://artists.proofprofile.net/proofs/artist/35bf3d53-6f4e-4969-bc72-a943ef3cc906.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 0x57274fcae8193db0f01f53f0bc037c9a07fef25ac91c203487d3c8a5c52d6baa. 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/ARG601101258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0866390e833a1e16b9a383756cb7b1ac75b1f106d7f24b60fcea2578ee31bbc4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARG601101260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe733ae4f11f443c425fae57f163fe22a6404f6fb47989dd6a11ddff00c05abd2. 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/ARG601101263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe19b97bde9a4a1deb21f4ac8f1e5b2d980fedc50e3f09fbf3b3f756c8242b1. 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/ARZ022200527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022296e81a1c5d95e098ab3e023ba7d7cb2f8bb99790aec39edea4f5925034b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARZ022200528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f62cea69c67fa419f1f858c4c8d7c4f9cc01c14e639ccdc35de68645b6d72. 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/ARZ022200529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b6149444291a6bd7d4ac0f81bc1c7fa0d3842f85b92d5238d6f2fd86d4a413. 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/ARZ022200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43044faa210dfe5f32f9d5411c1c3b740e07016353c9cb9d166930c7d8e43d69. 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/ARZ022200531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3012c0cf6aca04823d804a4b1aeefa82b2840b9d100b167f9faf5856ce1bcce0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARZ022200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd97ced4dde25203f75736c9e0f1081d446f7d18ca06672c29976976855da5f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ARZ022200533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dacf311582b741d2cfe1e4045054d03580984fabebdbe4b60d41dc1853e3ea9. 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/ARZ022200534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32100c138667151687f83fef115133006404bef95f9dd8a29615f69b434e6511. 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/ARZ022200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa988c540568cb1ceba83367f107388baa77c5a737b605595cdda93652d3ec7e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:35Z), 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/ARZ022200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19ef4930026ebbbc90b2fc640c665032571546549990bfab5f1422b8daf3cb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:46Z), 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/ARZ022200537.
Popurrí de la Bandera (Bandera de mi país / Salve Argentina / Marcha Mi Bandera / Yo quiero a mi bandera / Aurora / Juguetes perdidos / El viento trae una copla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa90837f31427d01435a3284f44172d06c0264419417cd7c4d8e6fc9f8da69a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ARZ022200539.