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 0xa561b258abba4d9eb710d890376b3cff2e3e7e58de2ea71b3bd057b829de8f3f. 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/c0c68329-7bd2-48d9-87d5-741f2b2ac7db.json and https://artists.proofprofile.net/proofs/artist/c0c68329-7bd2-48d9-87d5-741f2b2ac7db.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 0x757408f7bdfe1d7fa8f5e44da584331cc9ca095d3077118f53007225246ff977. 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/ESA011725270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b6ecf7dc5bef388402faa28c34283af901258f7fb0939f079034e791b9e056. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NLE612100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bcd45f1d4b6e079e48e3c21a5953fab5b88a4de59760e1dfad290dafc8bc88. 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/NLE612100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082e68d64268e580b1aad4c6b4b7dd418346c24dc578e7ce3c4967f6596e3f1d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLE612100088.
Africa Ya (feat. Flori del Pino & NEVRMIND)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902e59d976b54d87787489bbb5067d98d7cdf4a6ae07396c81700636da8dcea9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542101128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5bba9a1479e29fb030620e890ee8ace61201fcf32c7952918c8a8a4f6b7a7f. 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/QZMZ92229315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead807869c2eb6df2db5a23c57a4fbb68f013a734b49206cdeb7aecc6f64cb3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLZ542400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b6353f2bf61cba51d32004e7407a53307965b1e447d1fa51df78a77b5fb301. 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/NLG662200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a217f8015ea5c4c27aa9301b4c96a3af75be4668fc4ae772f161e9b5b012b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/KRMIM2106873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373b854959669cd180956ee12f4f3e06a1261218814eb79db8914c685f7fa9fd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/KRMIM2106874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ebbba5a07729f8c5940a2319a6a917d68d7e4daba4346b86204da59be5506. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMDA72391099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13344ae2bba9247beb94424862a7b8fdfcc5a0820e3eb58a0cc9ad1d51c851fe. 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/ES71G2041724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755ed24106d9fffd02b9183233853c40f33ea20c827c06af4462443c48eb8767. 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/QM6P41908860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4a6c12c0d9e9693802050ff9e9d65d20f5b620e82333bd7b1a7b481d631646. 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/NLG661900329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17efe215cb7f1f63ef645581e5fdc8261c26ad53a809943003b2fbf6791a611b. 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/NLG661900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfcac70b82d9a0ae750ce99e4e4ac5e593bf9910b406a00204d3786fed7ef88. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLH211800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f2396a735523435b1d0a16e9484c8c3e2402dbbd9e423902a886292ef480e0. 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/NLH211800129.