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 0xdc7c4491c928667edf8e5835b6acbca12b0406a46bfd8f110626a6de40539a15. 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/850c7451-a1c1-4dc4-89f7-7e6cf64a9264.json and https://artists.proofprofile.net/proofs/artist/850c7451-a1c1-4dc4-89f7-7e6cf64a9264.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 0x2e7de8d318c0b2f512cd35e531e2d99b981cb537c5fd64edad1c5e223e8c0587. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZFZ31975618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb702417a0010736cec2433fb7057ca052dbf393d1a6b5559ca98391fefbb7d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN31934663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a3ca318c65fe0251b1e816a031dd1d227e094ed31c7f455c5770a87d86144f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM4TW2067877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d4e193092599ea80a19339beef70e10ac1b75e2d906b4bba358d39d008f0e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2035335.
"Rastachai: Indoor Sessions Lvl. 1 - EL CATADOR"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b1145a8ebc38025bd3ae6ac6a128543c5ca8a875aa6787da5ce43181f4df5a. 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/QM6MZ2164942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec02e656c4a4cdd0436002a8895368b331a242e0e06076bdaa993a1df87bc0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6MZ2183909.
Chicos Del Bloque (feat. Kodigo & Fran Klap)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfdc46993bdc78668f9ca41b0ead869c688f18d82cc5bb5cf6c93909abc6ff5. 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/ES64E2206070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d572ea67933f097db3ff3c6e4a1a4332dbefbd7c4d183ea430fef231c0ad842. 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/QZNJW2370010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3aa62ac13ba23fdec6d36eccced945edc1f91d6bd823bd1b4224dcc1c0e736. 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/QZYFZ2324044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ebdddffe638acdaa79e0155b8b39dfeba32a854e297aac477a562b0d43bba8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZNJX2388211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467e483ebdbfcf48e584b99f8df4ae97cfe1c41040cfea1986ff1fe64a520f5b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTPX2381220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea402c4fc7c59624d08b0daa2437aad338d68e8a58920dd81be870f18bd87aa6. 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/QZMZ92385519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcecc49d2f3b1280616bc5fa4458ef672e30fe9e2b6b6a6bc17d6407dc528ef. 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/AUGBT2318461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fffdeaa686a43fce8b5d72a9341b93778592df73c5ad444c9537abec9af457d. 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/QZNJV2347039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad52e2d4c4dfc6fc90e2f922ef7fcde860cb65798b433295f0ac496ffa0b34. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G2025755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4a7a2f682bc16694baa3c0ab36b40022f2b09ed4da788f427d6fdfaacc5e13. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES64E2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd9c25590139409f57c13661f7e764105f65af98faf7d2fb2d334f925c6551. 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/ES71G2310673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fc6284cd91090c54a9b09f4f76d26134267063b5f132c7f792c0a90830335. 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/ES71G2225328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc60937f1afb0c5c9f06a24bc48719ab28898043c7c22ac4d29e3dca07c2e98d. 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/ES64E2202521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc7d0945ede85f6fa0f164a46599aff361413cdbef115a3bb37540c487a437c. 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/ES64E2469210.