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 0xa8e56a997c253769ef80e7892fd8721b6525bb9bb258567c53faccdda68dc991. 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/f4078d98-a7c8-4136-819e-09d4e05c8ba1.json and https://artists.proofprofile.net/proofs/artist/f4078d98-a7c8-4136-819e-09d4e05c8ba1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trolleys Thank You / Wonk Unit Saved My Life
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 0x5f07959589c920f0703bbaf9b309ee63bccd8496ccd2a1bfe093317f4bf46f78. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCACE1558374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd25f6a406c799421c952b52348de1f9abed0143fb6de95c347c1994718762. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCACE1558376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac7cc236cd445b0b42476140d85bbc2c190302c4ab29fb2cfe4757d3098a4b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCACE1558379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179516af0fef6b8af1fd5227715436c3b29b98d08e7dac58929c2f26e8894fef. 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/TCACE1558384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f07959589c920f0703bbaf9b309ee63bccd8496ccd2a1bfe093317f4bf46f78. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCACE1558374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c54284855265261b66038077bb190b9ab339d07ebc3c84efea0eb759d06e0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCACE1558375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac7cc236cd445b0b42476140d85bbc2c190302c4ab29fb2cfe4757d3098a4b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCACE1558379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179516af0fef6b8af1fd5227715436c3b29b98d08e7dac58929c2f26e8894fef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACE1558384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31576641e232882d9a28d48f902457811c127da5f0ec450f0681d22fcc2a01e2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCACK1533996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9169e49b00682c358d726ddc6264a959b357ea02a99bc6e79cb8a1f0a19ab. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBKYA1603168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb428657dcb9b216e54973ad44f9200c2a79a7e327712d147f2d1de71d3be6. 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/GBKYA1603169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf861289b802a4c819df8a96b32f9c79b82aa3e3344b883eb846abe1a52501. 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/GBKYA1803049.
The Fall and Rise of Wonk Unit and the Pwosion from Croydon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80c43fe555276da3f3cb2ecca8ed790d7f408a808ae4b66d0b32b2ba3ca2fe1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UKFGV2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b913249b0fb18342b6036697dfebe63bd377edda63adc1f10223b97acf53e21. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:30Z), 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/UKFGV2100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5401af48416a388ecfc622462923f3ff41a5c3ef7a982854ebb2d2abb05cc1c. 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/USYB32440301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e54440f4e23dda2c6acfbe628f9043476b8771707335d1248b9bb1ca8be1f4. 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/USYB32440302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca7ae50802b3843706756c0e45c52459ea7d326b4c1a852c7fa006bec3ced46. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/USYB32440304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b41b05ba2c74526e2e102e33d6381ada9771d7c079be75aa628482ff3851be. 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/USYB32440305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb425e04c56ea5e34ec7136420a4666ac8b7c0b9fcc1e7d08f7043329e6c3b6e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USYB32440308.