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 0xbf5fe6bb0f0695b132ddb4ea9bf3e4b3e4eb76846a01ada873710b4dd8573419. 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/b58a50a7-2631-42c6-93a6-6a16660784f7.json and https://artists.proofprofile.net/proofs/artist/b58a50a7-2631-42c6-93a6-6a16660784f7.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 0xce20425aecdad159b7cdb656255e8f4722242bb4df7ddc13e03549330c400fc7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCJPB2456418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c33e9f191c410ff917e689283472791e3604d9af3c44c9d1a0b5496da8c33b7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPB2412359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c5ce2aface36d4fe731fcc9b13f30b6284b0bf79fda6735012912634fba53. 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/TCJPA2401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3fe293396a8295d96aec435fdc6e141eca6ec1e6b0f78801fcc6aeaa658e3d. 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/TCJPY2309391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8369ad445814ff58fd160973d5ad33b22fb354b486cf6efb5e6953a230adc27. 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/TCJPW2350971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd917b99f6933d04ac08034c3fdb9129e3be7b3acaebd4303697f8333e6d637fd. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/TCJPU2210169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e3d7c28a576d88a7524bf21469c598b7e0169b999bc75779040394212841c5. 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/TCJPT2201459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6f19eab1f956e1eb155cc45b780d393799cd439c07d2bd8c0537b2bec4a361. 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/TCJPS2248085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663427dddb18dea496fb621402866067da72b1ee7ad1564f90f832c3b58d46e. 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/TCJPR2280300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ba97d1c027c6c52efbf2f520a0ea05e2f8177d364037d5b3de23edd5e30e03. 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/TCJPQ2134037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0ebdd528914b693aaa36b1cb701fb4cb5c7b6a2e2fe8fd89b5ae22290d8604. 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/TCJPN2162279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b428d09d2089164630bac1e55f85c72830424d2dabc142c9661db7f49a55b14. 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/TCJPM2053503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7498136c0cb3baac909b58d56fa2d94b9d5acf00dbe4fc4f5b689b63caf7dbb. 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/TCJPL2012004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc913397fc61352457230a82ece57d92691a82ebc4e7cbe88bebdf5af89032f2f. 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/TCJPL2011151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c20356b42aa655e5ca29df12ccb7389af1d4312fe88056e111ef41f8a352f18. 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/TCJPE1650990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14addf87767507836d9971244143544ab73e231947c7ee24257610c7013dbcdb. 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/TCJPU2393058.
san francisco - DJ Ryow a.k.a. Smooth Current remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062874a05863b2c0d311e9993d23419bcfb0e1f1d0b6f04b809f453c2116223. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCJPI1978455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d19cfa9565e77eca7675fcd1ce9cc57cd957410cfb36049fdfc45422b20405e. 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/TCJPI1978999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaa827a1ace893d2a8b5c18d6f819737445027da542a61c6af3ae630ff6550f. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/TCJPI1979027.