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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe32cb60dbb29fde0a88421af50c3ef3759e7eed869c062d0edb898e5a49e2a6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7902f11-6882-43ee-aef6-4d7f58e1d79b.json and https://artists.proofprofile.net/proofs/artist/d7902f11-6882-43ee-aef6-4d7f58e1d79b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Under Paris Skies (Sous Le Ciel De Paris)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156b1365b647cc0674e94b80014e26e73c8508b4e426c12f14fc5a8a4c01dd73. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CASD10500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa982ce9ee9f5903fcc18c22b425ff7810bda7e2e71049de441ff3123abd54. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CASD10500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7073dd927bcb64002f0951f5d52cb8f131d756cf09b7d8bca12862de312bb7. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:08:04Z), 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/CASD10500928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7866f283a6adbc9a9b2d8f299bd09dc68a1ce1c35043d4a062ab5367799f64d0. 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/CASD10500931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcef0b525ee7763a1fce3c49e6ba6f27084738890c5a9d7dc357277661f0a46a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CASD10500933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f75ad08430a5872ff067813875108fe15caba29773b528adcab6245467934d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CASD10500923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2687c9b28bc30792d9f1e6bd5d4ee4f59869ebd9f59da1fd02e741d1ed23b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CASD10500925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b81c3937905b673f755aed9dc6ba634ec768e9af148cee1801eee05360900. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:54Z), 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/CASD10500926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75312d6e92c1a14c14672812a711d4a97ef29cafaa9e56b8c592f9163fa3d9ce. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CASD10500927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7073dd927bcb64002f0951f5d52cb8f131d756cf09b7d8bca12862de312bb7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CASD10500928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5ae3c1e3c20f42300474d61c119e4c219742d01ee0bad3d19a52f1c5df783d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CASD10500929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed27d3888f7bb25b124144cb88a5f2e655553e3ba7a355e6522382d1c2b277. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CASD10500930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef665d98b40a4daa69bfc323c0e83663389112b0ef630cf378426605b7c959. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CASD10500932.