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 0xf5778c71ad9da3e025e3fd82102f36fb5a9a13cd8012775002c974229d8a9c28. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93c6480e-2218-48fb-8cb1-1c3ec8ced060.json and https://artists.proofprofile.net/proofs/artist/93c6480e-2218-48fb-8cb1-1c3ec8ced060.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 0xad8257ab4bf04cd6949ac425c3ffc6fd7dc475a62e935f1c82dde97cab123aac. 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/QZDA82315136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb24be5d5d2ae8c21d89f1e7731580ff9accec30c6bd25755c8e79e75a420727. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA82315137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce9850d29af4230547212b093f2f1df4937c2a2298db31cb1ec7693dcab0491. 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/QZDA82315138.
Only Time Will Tell Between the Good and the Bad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f142de2b24379fac36cccec45b52b50687b2cb98eb9245c3c0bb89fa6ad087. 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/QZDA82315139.
Again You Wake Under Dawn's Uncertain Light
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467f687bd0f0a12c5a40b688119a149775921921926e1af3ac4a2ebc633207c2. 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/QZDA82315140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c15f4c75541345a6f455d99b9ebfe4a8410c3c1c95966da5eb88ece8993399. 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/QZDA82315141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2affa26664193ac03b40b0a9b133621803a24e20981befe577698614bb54ea77. 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/QZDA82315142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c67ebc63ded58a7a8d8c1ff0a6baf733508781282c2c52baeb83158350f4a9. 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/QZDA82315144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe80045f471d5c6be50faca876927bc9abdcc967f38d8f8f27113a5f586528f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZDA82315145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bc680994b1a6508c513e7090ba5723ff800e1a7cf52ee486f76821ee855835. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZDA82315146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d296ba7d33f29a79be4ffbec600ee536b543affc28aa4a9a59e4f648118ec0. 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/QZDA82315147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91165c60747785c3b75f8b66ebf9494206b44decc9590334fc4d748a8464499. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA82315148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2ca4cc2fb7cf6dafaff588bf4fbd642de2a0648e6b46592f5670e97543d39. 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/QZDA82315149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d15c2c3c99803b37fa0a58e5b0d79bedfaf155a118d5660f65497aa6b49124. 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/QZDA82315150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f277cbfe9f33ad218e31d93ce9516c9cacbcf07c13d2d0ccb225eac12aa5404. 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/QZDA82316413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c71df9f57c1a25427e207fc619fbc111503da7f868df15a65efe1c0e86c700. 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/QZHN72492522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05978dd338f165a0be43a0aafdbc51e621e4690783f90a95c4a0cdb8ec882073. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN72492523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc1d7246be5b3e421aa9bdda8253f1248e1c302c6832c6c5340cd96a8aa66b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN72492524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789ba83ccdee94a1efc0c1537829a19f901da06f2947a2c1a15b8291cdff2c3. 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/QZHN72492526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6ca00840479de21c52ace3155334dc3bc27cb9a8af46d42b0612de10361f09. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN72492527.