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 0x0a140c850b45a731ce1fe3d7636ebab283af2092b841c3103526e26467d3c6f5. 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/65a34d48-3f44-4207-9778-cd0122a8e233.json and https://artists.proofprofile.net/proofs/artist/65a34d48-3f44-4207-9778-cd0122a8e233.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 0xec0429f4251ec499c82a39e8e80a6af15f9b43274d9ea56ba39c98cc6bef6e82. 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/QZPYN2362058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099a5b2dccbaca21920a2dbb21a2305e4fb8da1f0b1bb11ca6d8aa7130fb5436. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2561321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365b3c2ad89ac69b925c7bc802480c5b7cc819dc85e5074dd6965d87e242c073. 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/QM4TW2537916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316d0e42846cfa65cf19660a5b149e525e910019e205752d0169ff2f9204abb5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG2514363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac00eca3ce693242dc9145ff942d8315641e0cd75274b825e6ec203b8eb28f95. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMF2432540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6387e61673319b88272eb7b8d4fdba8aac6b0b36de332b1a3c89417c495cdd90. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9M2404458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a70651b7fac6d6a0e304e04f81ad6f182c0bad5c7a859456902ed887411dc6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTVM2472149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4337ec518a22ed5ed56f13f3da70b08b19e32f2d58f93a3ece2ff0e9951e420. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2460464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5091f8e21272035709e91b03f4b27f557b2db75296e8e671d3015e81bdaffea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2498949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106ff6b659655be23ff704242ace0dac9d15682d19c231d2b031407ef206fdb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPYN2386342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846712829abe9386ff856a791cee2b040d48ec478bf91424c65e8be39d33ed75. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPYN2385137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8615a1329cd9a0e42296e806bb14370e7099772b05a61645425e768159a15. 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/QZPYN2384232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4b0b8cc577c6c5edcf8a48bc921af9acec25f99263900507286248e782d5ec. 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/QZPYN2383149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe2ee755d081df0915a3db8637f359bfdb5baf993c2fec092331457c909b3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPYN2380135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf4b38f0f4cdb52d908b33f1d65c90aa3ccba58e0ccca8a819df2f9595cde9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZPYN2378341.
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 0x6099be1ae8dba27b8613322f63b1a50742a22cdbacc036595fad8efd4ef1ba1a. 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/QZPYN2381399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585ff146712b771437f096985a7d7b847c488ef8e05d4e474715245841fa0cf. 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/QZPYN2381398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c28e18f70c9d82dc1e4584826ebc3499410c631abde5eadf3acc7a2bc2b0e7. 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/QZPYN2380237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6324d88aa80d0ce127ddfa1aa66906b5edf094918b48406d1060927ab844d608. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZPYN2380236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755ac95343fee9e10127664dab2292579ba44c71a3ac2030bcb983ed8c06edc9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPYN2377589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53398edab5810ca8e35e97c1633c689c8a07e23da4a2dca4bc380cce008d5ca3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPYN2377590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9582b759dda5d64e37320833966f2336680c6f5252e5db951637ea50310a3622. 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/QZPYN2375800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676c0bdeaeca89090a8370be77b62598dd69c6c2041923574b3fa0c53ede8417. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2305070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e71408ce94b7a71cfcfc39724b93fea6a02919df0a7b44c5d47625db6ff8817. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2219467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c8b2087fa61f51eafe959db5b3634633ea4a15d4a9c48db6010c9a9652dcc7. 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/QMFME2276642.