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 0x6a9351f47f85713e96e35212627aa8232d92e7d0a50681bb423d87966980157a. 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/f2c89b04-d4c9-421b-b83f-48ab161262ca.json and https://artists.proofprofile.net/proofs/artist/f2c89b04-d4c9-421b-b83f-48ab161262ca.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 0x44fa18695266be4d775965f8352938abd0b68bfb6f0851cb4b1701ee4cb89c97. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USUM71502395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fca3efaa25141035649635b798ae31cf42d78e7d8036784f3920b1f822d47b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUM71502397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b74c13236d265b9b4c2f2330b701f6b552a88ce464d083e2ef6548e67958527. 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/USUM71502398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf2e4eb6de8047ffe84caef7f8f6c6514b79bee88abab2c74ee47a656ce2c76. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUM71502399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4b58db7c5b5648cbd7728d5992acc5480b8722bb81538cd1557e8f4f9489f8. 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/USUM71505193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a1ac4b08970cf999afafe27cae7dcfa4696e41dc9dff115338d6807f994310. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:22Z), 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/QZ47A1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb60ced879488e2dc3d9682230e7f7b0040fb5cb6516800cc24daafb99c0fbc. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZ47A1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5638f66e598e9beb329afd2395a442b1f5a682112eef37d6c39356d384cfd6. 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/QZ47A1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f603fd2716e961e0fc4a47fa5dc32b04cdcf7daa2a9fd767f2ed876e23e6b7. 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/QZ47A1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d6eb93eae17dd62814fc3f791f5c3109ef856e6693f1fe53dbb57113af9da0. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZ47A1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b851a3ed6422534c7ef79582a8a2f0a12e5c2b119ba59af48fce0c8cde85c0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZ47A1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f603fd2716e961e0fc4a47fa5dc32b04cdcf7daa2a9fd767f2ed876e23e6b7. 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/QZ47A1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f506a5c84f8c08b1af74bc7f488ecf162a6bef23bf115105b4e06c5fb482e88. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZ47A1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5638f66e598e9beb329afd2395a442b1f5a682112eef37d6c39356d384cfd6. 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/QZ47A1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0d74803bdc4c1132774e830a2c84ea0349586ac0075c352695fc097bb6791d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ47A1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c94e695e171750899f7e2e9116d226e2aa384d52c0e000919aad657816c3a1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZ47A1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9ca696a85e0f8cfeb99166dd91fcd53aa1c2da936c1c4bf42b667cac473c64. 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/QZ47A1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165fa50a755a39b4bfb94927906b6ba4462bc07f0e27129979cf46bca7f10fa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ47A2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227897e5bd4b24dd75c235653a07cbaec06af5da84bd5b6dab3407b8352dfcbc. 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/QZ47A2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296247e7d586f2cd19d821cb994c302e7161889821ab9211af30210610d7dcf. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZ47A2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165fa50a755a39b4bfb94927906b6ba4462bc07f0e27129979cf46bca7f10fa. 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/QZ47A2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d5c3b1e8d0d63068c140a1c8a39e70fb368315b3b0e7ab60471b7525fe77d. 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/QZ47A2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe319503189953adb92cb1896932d470657c8ca00158b8e07ccf07dd4f1ed0153. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe319503189953adb92cb1896932d470657c8ca00158b8e07ccf07dd4f1ed0153. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CAN112200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a156a282141f274fdfb61984ef0e4db6110b123a837fb008a1f0b214e90bd08. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAN112201017.
Folk It: New Folk, Alternative, Indie Roots Rock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f603fd2716e961e0fc4a47fa5dc32b04cdcf7daa2a9fd767f2ed876e23e6b7. 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/QZ47A1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb982535c9277c6a2746b27e8b428aa8ee6aca66a606f305a82480342fbc55d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZ47A1800001.
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 0xf05454eabd6b8a45e9cb65f883c067cfd4a961c4358946a00a36b0a09f4d745e. 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/USQY51524484.