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 0x81c906921907c03a82dded1c3013e65a6a90d21a48d4a0a51c58a5572f3527ea. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/159001ae-8f25-4c16-9ae8-5ea082c0c66a.json and https://artists.proofprofile.net/proofs/artist/159001ae-8f25-4c16-9ae8-5ea082c0c66a.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 0xbd5c6e7388b4bcc4807d3e395554d76183883fb42eab4283aac9f8846aa045d0. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZPLS2402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ec65a41cd49536cb987d485a3bf4c6b2d28b89d1f0a8efd9bd944857ddc5a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWZ2353369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f9bfec425b3fb23f679b86c59fd4e5c57b13b8f724075f5fade71d8f9051f8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWZ2353370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b069f17a07eb794dc41162b988d2904e2fe24a0b4d66259dd89faeb5831085. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWZ2353371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6f2d253b6cf9a4692e76f1fad5ee27a282cc02002789b995f20eef98ead144. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWY2473728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a6b0f4f2f6571098d6f2d173dfacaa23156de75736ad49de3b96f14573b76b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZWFS2472112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefef866bd946c7923351b65d368a84edf8339f8ef23cc870a6157546a00c71c6. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWFS2472113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072ce4ae87cd62682e75d5cbdb80539d5b26c646e2984d6f9056a29d5a3078ae. 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/QZWFS2472114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b2571d7cedf4dfbb031f94e6f639c3c5a900a7e822f32667de9f193d90e624. 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/QZWFS2472115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7e24f0411f928c185f37a01af28034e59df6099c20eb414432fb042503823e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFS2472116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af768484e0cc41b4e3aec563632bfbed91a99825704716302a72d207bd881c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZWFS2472117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442b5d85d81e430268ce2acbde792cb82be839ce73b2ab4d8221cbf7c85b742. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFS2472118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e51517a74125df7b2d0340822d591edde0170815a4e3f4d8dd8babf884e64. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFS2472119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff4db4291b0e753c804dc60d336ea166407760d01e7d102e9fcda4125170f12. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFS2472120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feae7f3d679eaa24a765b18f0b98be7a11a604972b7b5969a2c4bc5437da925. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFS2472121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e8fada0b0fda44d31ec6851cc721e63a8ea204e0587d517c1aa4a2615b4777. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWFS2472122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a061e19d0b404c4a47dd14b580ca59bc4e3f21df39602f178ad69cf70fcf2d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFS2472124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3625a4526685630dcfcc9ff21a2efaa448e4cf8e923d012de02e734c6ebf8c57. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFS2472125.
Promo 16 nov (Jololel Show au Stade Olympique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bcecc48985473ba869df29368bf7ae003241618d607533f0c243aa0a2af864. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ772473925.