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 0x57b367713b42523461a65145e7ce418cf383943a944eaed7fc08cf069a78d695. 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/68f5eccb-ff29-490c-86ee-a166e3c2e177.json and https://artists.proofprofile.net/proofs/artist/68f5eccb-ff29-490c-86ee-a166e3c2e177.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 0x6c78286e0c07c1a5a195e80027a00909387a21a93f4dc25786d0e0b2cbf1ed5b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEQ121112701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6564699cb5561de0fec85db3731db29e0c1a741e4b4a0b9ecfbc569dda529a0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQ121112702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097e44a3df8becaf19286fd44e0ef53189814d418e660cdc9bb77af37c94df97. 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/DEQ121112703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d2105b2031fa9b6449dc685cfcd5374385bc05591ff68a8159fc7186dc291b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:40Z), 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/DEQ121112710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b8e8e36d2876bb22820769077c9e7552b816d7d723d04be599bd395b525a6a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQ121112711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09f625b5e5d084fbc9b9a3cf0d8a67e6c9bd646ccc0d1d2dce99b2af84e879d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEQ121112724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf90d1ea878876fa3185fcd09945a268b3bb78311a06d43320a475e044c0da. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBT7D1100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5934e1976d8e70c8217a65d6060ae568ed6f7d315fac0a2c53376a3a70169246. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBT7D1100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0257521c2f6be24e98844711af878e7a4707956f14511d8232f40e6f64ca2a24. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBT7D1100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9b66f328d15cb8e981ea7dabd0c344d6333fae4bb7e1406ccbc4f046d29eff. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBT7D1100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bddcd181b338bc07b9acd9df06248528a6773ec71797f6517b47299ba6908b. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:37:11Z), 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/GBT7D1100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6cdf90b92d4f2628590d3d6a5c603506fb2bc5b711a3116f1608c547eb2509. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/GBT7D1100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61e7d236f84f46600034d74c9ee32492007bf263fe71b3560e617501052790c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBT7D1100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b405655de476e1e4aea00934e7811ca031caa6c7b19667de47dd29a35c5a63b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBT7D1100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe299e78e4eaedb759456339784f16274a1f26435166613c037fd73fda4400cbd. 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/DELJ81958902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1c43b875d447567e35346ffe4111dde8bf4667e64c46f544c1a35a86911f0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA52003831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f42a18346fcf904d4c8a3675a597baed9e2df4ae361d02d29adf3e7f423c58. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZDA52003841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725bf41f427ea042c0eade0e34de0cd97d9cf427fb930b0e8d9dbf5872d34d49. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62178504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ea88f3e6bf8e2ac42ee5bde07f6c33ca60605d2e3b2dbccd174df099a0500a. 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/DEQ021801838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdfdbf1d6cdb842bd9ada277c57746789ec0c13a06e54468e68f3fe61c28adf. 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/DEQ021801839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110c8868b2150cca00bda429cfbb68bbe377fb3b29c6d9b9d43272db8477636. 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/FR2W62100041.
Kutmah presents: Sketchbook Radio Archives, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27460e8f7414e1231fac3bcbc9509c3c0c34a573c0e8a12446420fc9d4d147b6. 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/DEQ021803293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c456b7ae40f4ff93316d8a348000fa4d4524f84182ff949e1a1a69f6690ffc. 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/FR2W61700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99b65a677939515c41bc60ed438ad48560f2ab29d9bc3d058131798aba2c55. 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/DEQ021801835.
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 0xf144fe70cea760d3a55f1f0c21e42ecb3b4cfba721f6c45792eab0552e33cac0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QM9K31201580.