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 0x50b22fb9176616ce5b4c8532f473c8e57fd656b0b2193be037de77cae55ef938. 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/c308e6a0-5704-4a92-8358-40252f832322.json and https://artists.proofprofile.net/proofs/artist/c308e6a0-5704-4a92-8358-40252f832322.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mack.01 L'impact du son (Deluxe collector)
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 0x8110faa282bf0690ff450cc9fa3804b41331aec6b5261f3178ccd1874700b85f. 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/FR8GV2231420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b904dfa807d3eff72ac6a8571885140668bca0a8d276a3f1b139dd4f5eef254. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR8GV2231500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1906a2f4d9e8b776e04b2da5151d3490e3c313a135a8a843b459965434411dd. 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/FR6V80416259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c3730f472195c2347ceec1754dda00b18aa34622a87183d9fea58f89a901b3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR6V80416263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c56e64e47b16d1fcb2b29bb626a3ba35735b6c3582708f67964475b6d1c30. 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/FR6V80416265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ea456d0e6757364caa963841d49e741706cab2051c33e3f92db379586d31a3. 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/FR6V80416269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c50496c4877ea5563bd99101a271cfe2092473677b23bfa231a484de11aad7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR6V80416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7423b91100221748c170ea939b1a50291a39f15617143c2d83782bec8f7b73. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX851801154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc75c0d2c41dd5c0bcdbe3699fa1e8ff8bb787bf171f17812fbbd9abfe2f02b. 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/FRX851801155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bca9ef40655581df0661d9424be5725498e6848c30afc0ef6128d2b9ea92be. 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/FRX851801156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1010e00d4d78d1467f12532cd0a0689ccbb978c4fb8085d4b9b4becbe28ea2c. 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/FRX851801157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517332f02b2933f78f94ede4f0fe663510da0cf6ce504e8c64bc77f8b4c1f0c4. 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/FRX851801158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2b2c2df6960e59f770c9bf652393c1921cae2f7c8ecdb1dd5d16d7e1bb691a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FRX851801159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0172f1e269ba3dd268f666a703202982092fbf6f84c1a87bb2c0a64f99bd3. 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/FRX851801160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc8a2a6826d850d2060a441fe75322822ccfef28dd357fca6c9f071845d098. 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/FRX851801161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1301327330b1ddc8c22d8b6ec89943844289080456bf561c5cb5ad77b2c035. 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/FRX851801162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09686a8ded4c5dfae22297de9add51123d0a2229b35e1f9b6eff262cbbacdb28. 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/FRX851801163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac58b9e70b83304a81e788b0efee43191dd60a8e8a83061ca4b7c6ec2363446. 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/FRX851801164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911159eed17bf664333fd5678fb8653ed9c1ff590f4765098f865c8d8eea1251. 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/FRX851801165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b8ef249a78cac7018e9af5987efc545925f58a3b6543b0d1e55c7a30f6baa. 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/FRX851801166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa745a97345b0ea220725724e062f2556ac41bcecc3580dc4f34971155d59bc5. 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/FRX851801167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83a0c399742ec6d0b786feadceadb56163003e75cf95eaf77936465631ef351. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FRX851801168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e815de1245e98daabde405dc878dff267328ecbb9fadd3edf2ae420cae4fd4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX851801169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb35c3e84bfb71773f87d30d11e8c3eea4f662cb9181c4adb612d11c7484485. 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/FRX851801170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65992747d9dc13143387896ee0a7e6d6141bb456d870a18e4d937d62641cacb. 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/FR6V82556286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865a91cb6ef78b5658bd6f1aa1c4df1c859d465ebbb7a20394d403267d169e41. 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/FR0U91400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be4cacc7475144bc73e05dcde701eb6b8b87f960483c4a731f7bd134d2139fe. 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/FR6V80258146.