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 0x5ce71b24e456e28b22127fe15ecd62f03c03c73a249204903db95ed1f23bb47d. 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/939ee705-8119-4512-831a-1baa06715da2.json and https://artists.proofprofile.net/proofs/artist/939ee705-8119-4512-831a-1baa06715da2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mitthye Premer Gaan (Original Motion Picture Soundtrack)
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 0x75d1f1f7eb38b542dd15b0a3ccc72bc90dfa2e87a72c736e5dcda6c3375566aa. 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/INS2X2301012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4658e9a30f0864794ae9cf0a014baa444deccda6523a048c513b4d22627ed30. 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/INS2X2301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b3871962ae91b03586b940ec39bdb0638c2da0b100d7733223739bc12ee93f. 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/INS2X2301014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23f10d9ec481670e8f9b84f4a67ae03e6d52b8dc7609ffc9b4212ed4102684f. 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/INS2X2301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cd80fee1faeefc7f2b495b3362ae17822f541cf46b0982ff31f8e10f54fb49. 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/INS2X2301016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d9e0fb7105071b8661fccedda45040421791555004118334703fe5327ddcc. 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/INS2X2301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae8f0a197bd6c42664b99a7191fdbf8208015deb4a487e31c13ab3b1f133da4. 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/INS2X2301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd28482c37827f33777cbff8e23d944576fdf7eaf4022e8363aa6428f692095. 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/INS2X2301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea1ce55412b2b54a9ecb61cc0c6e42da363769560547ea9e3d1cf7e616ba46. 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/INS2X2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531861115403d77a7729bbdf18c0b3ae7b57a14e2f16ce9ed61d4eeb26171b2b. 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/INS2X2301021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8a51d56a757cd81c14cceeeb1b289c41eb6d87acdc94dba2196db549d3ba92. 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/INS2X2301022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16497bd5da26ea7cdee555e69fbcd80585a21067fc1808f27111b4ae6a7289e8. 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/INO312401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5e9a996e9c1f889dcb46285c6f9dca0589c5ba61d58a333c759b2372d66a8a. 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/INS3O1800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4f41d5a27aaa3ae3af7087e1a825d44e441099fa61d9b57a0a7f32c4b7664. 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/INS2X2400026.
Ghum Bhanga Bhor - Banglar Gaan (Indies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf953f33ff8f2b8f151b23b738e77d64224e978d7f5bce64783b8ab1089d6a437. 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/INS2X1900927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb444e921774ecc6d0bf3f5be2d3426e99bddbd7e53e3ba31e8cf3798f89ce0a2. 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/INS2X1900931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959242177cda2162d4ecc431dc5cec63040315cc480ba39ca4b1c3d0ff8dcedc. 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/INS2X2001204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c415c341a4a10aec823618f6aea28e9be3f097d2f45450fc27519b9588b70bc. 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/INS2X2001206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20dc10c619478bfbe62e957d68a98dd1c8a4529e743a3667f1bf4dbaba1aecf. 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/INS2X2001207.