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 0x4a1e37fe9b9b5fa23e20d4834f1b19e5555987a498530d67aee527a947ffba22. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd8a0fa7-03f9-4dc8-80a5-4f85f80bc704.json and https://artists.proofprofile.net/proofs/artist/fd8a0fa7-03f9-4dc8-80a5-4f85f80bc704.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 0x0b132515581c2669d5d1949e97a0891dbc06f98aa23c9c3677e5a5b5a227bc2c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZDA41984018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9b1ea06c0a3388b82f66c919e497298187772c7c5b2f442c351922c4c4ee2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZDA41984019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2504e271f7ad445b43058baeb02229471ac013ddabb2c77c2a0de518b12283bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA41984021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1883b8817a81a897a35d3ebe5faafe523bb6fb4b15259232e0efececcb72488. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZDA41984022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeddecb7656a1e65be407f0940bda165c227b5c3f62f2e03de59b277519d9310. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZDA41984023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b0d9202c53e06b5927097a183d89b56807d9eb99835f4d1cfc4870bfb1c892. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZDA41984024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b141095747d24b3f23eef7c23a23749003137a0ea1dbbd2060f786b2d85832. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA41984025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2668343f948c289162cf611bae831b1f46e27d0830f5f527f12669c6149fb748. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA41984026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533558b3c2e5b49953ca45455a1780b009f3b240c0378fb7f4362b0737b9cff0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA41984027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66576b874281def1e3c7a894982a7efa76e0757f54067c2e39bb4b0d7fff3aac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA41984029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebf66f667a106a71aee71d839cbaf19e7085dc59a614bbfd4a69e429c576750. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZDA41984030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b9175b85cdc77a5125cfa3ba9186650ab59daa931247bd9e24653c43e169af. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA41984031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d60cb59e80b09018a2cd0fba36562da4908179c5070e772e5fed30f38e1ba6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZDA41984032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f1976b03f4fde7513d755e76321678367d93d6a2b166954ebebd15fc948701. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDA41984034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb558c3229e4a201d0c24980cd0414b6a3d113bf3e603e0ecc02fb0464a544755. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA41984035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eff7c6175a1c39f769990dc8cb404461e93876647c222b47a1c7d6b9e63c42. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA41984036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42b3b32837f1e87a8d4a19e93682bb82ca94427e7923b02a1c2180029bb0b1. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZDA41984037.
Όταν έλθης επί γης μετ' αγγελικών δυνάμεων
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a2cf1b3d23af0eaa0c759119d63d80e2813a71409a9e4cdff674c47c0756c1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZDA41984038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dc5d8beb1e3d10d384b99788e669865813577c43b4de74780ac39847b10c23. 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/QZDA41984039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c6cb9811fef4136676392b835889464160e3912cdb3517252573d60a80df25. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA41984040.