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 0xf7a0fafb3af90f218b2d0ce85fa02e1e7b67ca8202ea0f53d6f9d46b67d9f729. 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/bc4c6467-cc3f-4192-a43f-b14b1407d005.json and https://artists.proofprofile.net/proofs/artist/bc4c6467-cc3f-4192-a43f-b14b1407d005.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 0x84e6c6aef4b5f0b7c170d5641b571dbef6a57afacc96fd1c7c34de393e2f1e1e. 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/US43C1625474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8358888c3d494e3888ea8b3de1affcd32550a89b877674d55555d7a6c7d99526. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USLD91753500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe542b1422fbeec466e3f3528078616230456f70b6fbcb924d71967cb2412c5cd. 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/US43C1631827.
The Lost Crown (Original Music for Prince of Persia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5b5cb7982939ac055abc0a5a33573afa46ffa88938c61cb6ecd3c988d5e3f1. 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/CA2BN2303297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372bcd08dcdee5cc2eb75f59f81a87e688ad73768440239abf3511a86f3ada4d. 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/CA2BN2303298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9092ff46caa890b944a39742106df971ea23cad45919635c79894cd816cdc8f. 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/US43C1628168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e008f5a35b1b27c33f471d2a4c7a0c4bbe08bdcdcf2b938a74dd35e2682866. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US43C1626120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f436b32756383f0593c3b157ba9e62772aa5c4b943797b524c16165855ab447. 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/US43C1621293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872eb85cdaad673064abbdaf8aaab630c3e34bfa17ba4a42f641beca85fb6a4. 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/QM6N22443965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a7347c05ac550b82832e5e824f176a39fbd7f0979abcdea0bf68aec9996245. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QM6N22443969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f248382766e3cb5eb7c0e778a0f22d1501ea9db94d76f049fd8f875b8bf4e6. 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/QM6N22443967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc847625eb86cbde997d135ea1e92619382519bea3e04dde9bb167b4cb0dfc1f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6N22443966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea80095fd6b736394f450ea66b334d05c79a0d2a2927f73ac2a8d896fd8cb02. 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/QM6N22443968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b028dd3bca1b6d8393db681b6f70485b176e7cfa19b3bcc96d7f5e1a3bf0056. 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/QM6N22443970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2879498025c9f78b7a224e0b5156293d927de116ca804e2b2d0e1e9890ccea. 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/US43C1617278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a10d50932a44d8b53d42607d24fe60bb9999b8da1f03d2cf9349416497001. 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/US43C1629664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1567658f32ef9affa614b00a4dfd991634aaa86d11adda1e819f134480a735b. 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/US43C1631592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b269430b851620aa15d5720cce08d55976a1cd19349994c8ffd798a5e0c9b4e. 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/QZFZ42375032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15dedb74e2a391534ef8c85965e37f0196f59b0a23fd0f13675f7a8fdcd4d8f. 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/FRX762190466.