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 0xbc6b9f468853306ff30c0006653bb8721ef7d8a321f2e0b1989fb94a3894ebc6. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9306a7f0-4412-4ced-b0ca-a77020a2ae7a.json and https://artists.proofprofile.net/proofs/artist/9306a7f0-4412-4ced-b0ca-a77020a2ae7a.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 0xa7120848c1099ceb49fa8d4ff6574516a4d11543e944ae0829f466b444d4150f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:35:13Z), 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/BK4DA2307326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67c6184d50e07319455986f15d8d252ab439b08464d93fc4d0ba4b471ae55d. 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/BK4DA2307325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab3108f9b5707f49167f80552e0f3b80be536b2b7803703effec0634863093. 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/BK4DA2307328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373216cb2d4d5529648299fa82dbb603e30418ca2ae7122878c8eeae6951cad3. 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/BK4DA2307327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ffa47c675f2e15c9daed0fe222d60522a18ad8d3ee99afc4b390318bf5dae6. 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/BK4DA2307329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a6f022d9f5bf347cd1cf85736d8a66d1fe9c80ad934e17def813cf8e09b7a8. 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/MXUM72103424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbcb2652cdce997a9073112b25cc6e4d245a0a0869e77b2e251fc6fe6389ee7. 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/MXUM72200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beb1fb1f5b74dbdd1d7c1c54dca53f73a3e59aa579c7209caaf620e55ecf3af. 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/MXUM72200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a8c5256ee3ed218c716f1ae8b08e27431a1551ad35204560775518ba7a7abc. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:28Z), 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/MXUM72201134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d8c8e8ea466c300284c476b44f847c4c0812ed44b8aff93a889964398af71a. 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/UKXN22188704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b4b1281b54266741e9d5a9e2381203094a1e8e985e10bf6ede99ab7abfc298. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKXN22188724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661595232501ed8eb748a86ad7635f970d7b0473bd766493e4206662cc7549a9. 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/ZZOPM2231304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2eb8b4df6310d2f485880f0f019ff11a95984b851ff0f12dc37ab1f29fd99b. 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/ZZOPM2236881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f622ff0e581eafac4e513cd832f1af2ec57f4a1a0fdd964fcf01b4648c3f391. 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/BK4DA2204077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af1b1c0c48fe9668ffbfa39cec436532473873dc45616cfe0a1adc0c77882c. 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/BK4DA2311781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ffa47c675f2e15c9daed0fe222d60522a18ad8d3ee99afc4b390318bf5dae6. 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/BK4DA2307329.
Cantando al oscurecer: Anjelamaría Dávila en canción
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3812a41ff3c0ef6e97e9af39870e12e5846dd3f2766b5f81aeb957d8c526d7. 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/QZBRF1846148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe17e4f4d24d3f67d2be7bf5e3fe38f76b3287c279a164c0aa56e985d4485e5. 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/USASN2220759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db21b99d9c8177ad2baad98c4e685de269757c1e5360fbf26da4e5258e4307c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USASN2220761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe7b031150bcbd8bcb2639ee8c9306ea1adbbdab71928814b6f27f74475bd71. 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/USASN2220766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1c18f87554c2367b49dc40809029902bf532089f211e74daf9ee9ac6524864. 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/USASN2220767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8343c0d45d1960765e375e93ca06f429b7bf22aefb024f578d28f3d77f9f4d25. 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/USASN2220768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f77a848e678f9cdfef5e30c5220c8dd6d139667fe5ee329014154a1ced85e02. 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/USASN2220770.
Everybody Falls in the Summer (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c001d7aa605dcbc45237ca25f0eab948d8f4aec7564ccbd124987b4e85ab2e. 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/USL4Q1871353.
Original Motion Picture Soundtrack - IN THE SUMMERS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2ed5485f826f8ef2eb1914e950ab82e395affc1d0a17a6cab487f5ceb1c82d. 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/BK4DA2518554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5b28ff7df38266c3d42a2b4a6376189631a1be99f504ebb60a3bb7696f27c. 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/BK4DA2518560.