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 0x310090aef8f1408466d35e1b6d93aa820c7b1ad758bdbf55e72e4d3e992dd0bf. 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/279a307e-2365-40ba-a40e-b7ea3d5d82e7.json and https://artists.proofprofile.net/proofs/artist/279a307e-2365-40ba-a40e-b7ea3d5d82e7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a71f97a0e66aee344bbbd2436734ad86f3631925ff8a799b55c28da3dba1875. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB22235639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a2393535a366683d51e4bc02ee15f17266a180392084ceef0de4a3cc0b5ffe. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB22235640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783d37099bcd6cde09f047251ec5acafff00ca80996a9a52a8ded68f8c23cca6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTB22323033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d90ef269e1d401452215c441d136d6d8381da3d2b090a581ecab9574a39907. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZDA52424161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008cea6fd9b04f7ea2ab9bc952567a31463d9b6dc57c23a041eaf7884aba605a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZMEP2433380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8385db8dde44b2ebdca58d07dd7a3b79ae5439e5dbc6b2f346482551e7be3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWY2470240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed5ad98789cdef531e3898296d9017f5ecb072878ef1e12a6d804095ef5351f. 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/QZTAS2472750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1cfa81b0e121160570bec575303e03ed707794bb55670aa8691228b27f2b3b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAS2472751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d432ebbc8d60602fb371fb5e918c7eccde8eabf0030c6e37925ca8696156db0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2472752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb948aca6badea5e013b3f08d278c10690b29526546541d6a23f34a161c6fd0a4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAS2472753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b448920608d0a536ecb754c7207b46a988aeb8a8c3280b2005060c6d89dbbb4. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZTAS2472756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef52852f7d122973649e556b5e7bb9c1ce526f7a362bed22053f342a229600. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNWX2460251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f2113b8935074846e9837b216b9f89b8811a3ee59c9e183cec5350c39a3829. 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/QZTAS2472757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed701ab1b0143d80d69b64c3030629a1b33a10ff366c79253ae95658fa4da2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFJ2465468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a225e6e3074d36f75db3ff6d77c80fcba2b528bdd13252ac6346250292b7f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:56:07Z), 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/QT3F32421431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd5bbbe99b8a9432ce58fb091545015cbef566bdc49b360610523f40e661bb7. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZHN32521111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa0c550a5f9bb32f3d5dd684232872754f4fe6a479e9a433e9a188279d26f7d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWR2532944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711eddaeca4081a7aa116f066d0fb4d1f0ff3eff9f0e5a591d79990488e90919. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:59Z), 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/QZWFR2544797.