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 0xc42e697c2a42fff9f5660059657a90aaf308d422c9a3556b39e2baa73677ba11. 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/0bdfd9a5-405b-4d28-895b-edfb80568ed9.json and https://artists.proofprofile.net/proofs/artist/0bdfd9a5-405b-4d28-895b-edfb80568ed9.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 0x70b5b517726decb0ad570be314512992c191091a400855de4ad3c935f9693d1e. 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/FRX201857723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0028d8006ed1b7d83c0ce43a361f6f1f8dd9b1c1b7215bf39c652d9aa1aec06. 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/FRX201857727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe649bc0ce9bc2bd638906a057d529494c2bcc9b6e0b3ad688d6c4d4aac313f6d. 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/FRX201857732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfacdee6d7a25c553a6954ad681dfdceb86b4ccdef1299b04face6ae99058489. 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/FRX201857733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75753b988ad53a08a37f476935916665f2a44919a0b07f803ad1d46798497e5d. 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/FRX201857734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212c9f1c66ab6b7cc84c2c581e9f8be9f6f8a6631c2411d7db41212731f46fc8. 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/FRX201857735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e38fe4958aeb077a390145a9f009374803897e0180c9252d40edb6d1a2d6b3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:17Z), 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/FRX201857730.
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 0x46b07c09e4206a3e24b907f0b47b862993415f73aaa83205546a912d00234162. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRX201857722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042c3130b7e516d29bb3ef32e7a5c678b3ec8ecc2bd1b8af00da9f84f577497c. 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/FRX201857724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3972f91cd04daaf9f61d195df29267df7e15eb660c920e444b91cf9de57a928. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX201857725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f414c8e995772c00b1c5020e77f37eb39a29cb88929400a52a350bc8f3aebd0. 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/FRX201857726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b310bef17cfe346d54bdbcaeb012186d511aca8d8fa27dce0f4c0aa679dc0b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRX201857729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0058319a63f67bd054c5a76562c46a8b3c0b422dbdad99a4a998922fad68c8ca. 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/FRX201857731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381c5eaebaf89925492fe20bc7d6b6e387b5c35a106eb2f3d0cd84b937d31cea. 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/CH6542065814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7583bcad296153d0cca62101d82bebd215e1da2c3467520bb5551c6a4af556e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:29:53Z), 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/DGA062270100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00e3902e773b11cbc741f4a52b9e5d21f87cd241dfce8a21a20ee9b22ef1f3d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DGA062270115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03e37fbcc95887b3598b88e397343673b4d20e016373a0494404dfa61fcdc6b. 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/DGA0R2308245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79450e88bb470b71adf67b6461d07c6cedd68269da379eb0c9de5f371f1463. 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/DGA0R2308249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490caee8b03ed99b1409a1ad94785d79de89f2187ffb5827da674aee84d5256d. 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/FRS182063789.
Dub Master Clash - 5 Years of Clash, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e3e14b7451adc4dc488c464b1acdcfde95f0d6952202e59c788f41261a242. 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/FR9W12123417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a9340ea8d9119bb3dcfed117bb7abef3ccb91fd81ddf3593fe39211aa74c78. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12123418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d885a52cc2a0d66fbcd5a0f80b38fd488aec40002ae4bb184304942c92c8137. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CH6541634029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bfa980b53968f34a72f854f29ec687d7c2be45966869fa690a4371f3ffdc4d. 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/DGA072102637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888978569bfd63876eb1cebd5ac7056fe2500876524e5e97d1d7033040e74a2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR59R1807709.