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 0x6c07c2bbfee74ed4079f0a1ad4c949de97a84bb40a9d86e8494f8361ba78b386. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47dd8cfb-57b5-4cf7-9e49-1aa8fbb98e5e.json and https://artists.proofprofile.net/proofs/artist/47dd8cfb-57b5-4cf7-9e49-1aa8fbb98e5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bajirao Mastani (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 0x3ff122668b087aa4735349cb4eeec372c2a3ac0c6f62460f947ad9bb0a296141. 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/GBSGZ1500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131732c3445d54f1d238402cf4d526e989a12b2e4eb9a672d602ec54dfc2848f. 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/GBSGZ1500569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d6edbc8f2802e75cb17ddce53b0a25cf801a3f3150cc0f9a7176e754dabcf5. 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/GBSGZ1500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579254f6695d26786adc9d72d02990c3d819c81a7707117349ffaa3650ce05b1. 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/GBSGZ1500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8f300d0e2e622364e79dede7fe873d1bbc427c596d1cd82da8ad7da3a82955. 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/GBSGZ1500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a167e2c770a8c371503c38335dea75cf32342ab695b6a5166149130e2f3ed1b. 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/GBSGZ1500568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f76b2bc6f929046fa115e7d86e485bd762b160256bf29ec9c45ff894c41fb4. 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/GBSGZ1500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf896508b21fcb28fcd7b6102b79571ec7a8300349860e32a8844ae618592b9. 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/GBSGZ1500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6edefe1f8b8f6affe50ca78eb3c316ca4efc1528a4ec7d2b7ca8e244585734. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INS170202230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c6435782f2a1bafcd769ca431e07ee5bbac29ee6b93e9d236a1e439ed95cba. 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/INS170202222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e25fd09bfd072ac5428839b04f90f377bf18c64719c9fc29ff4108f0a7a9b. 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/INS170202226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec199db649be4cca6f4a7bfd6f15d9ee17091bddb798e31faf09fb1f36928aa. 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/INS170202229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02faa67c3504d2d0ee1472327c7eb258111f7c3206d334e99c47b5dee0cc597f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INS170202224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36583ec481e391e35d786edab3c0693d0500415f37b3ee13e6b1767cf3b07fc7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/INS170202228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa785fff9cec16d62202fce240dcf96c3fbe9ecc19f0a5027b9344d4b6ac7627b. 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/INS250100441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac7ea185704d03012b80512b9b89cc798338b1edf568322a3d2ab890009bdc1. 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/INS250100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d5ef56186d6885ddb568bd0cbf6c3952d8de8347c851d08f5b62d519299a0. 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/GBSGZ1500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620f9887c506618759bd987ab1a1f172c61eb552462bde6cbb001e5c2d0143e8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBSGZ1500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e1e373727898324fa2ae1e636fde971085f32f0585eae561db33b439aac6b7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBSGZ1500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf405e7a9066806e41d18c22cc8fa98de58ac0cd8d7702992072bc776423741a9. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBSGZ1500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6514be416fce0d2a92c681f4020c52a52933c1130b3aa3680e01c08129e3fa0. 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/GBSGZ1500583.