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 0xc2a8fead3ef0b487d3503cc5ed9475ded559b09e1e3362f73d979f699657f61a. 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/551fd781-90ad-48a1-a50b-ae394b22092f.json and https://artists.proofprofile.net/proofs/artist/551fd781-90ad-48a1-a50b-ae394b22092f.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 0xb0e8ee5461048f94130f0943d732003303fca28c23fad381b0c4028b65f502d4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR26V1508757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e32b06299138e358db2d61225cf3b6092feddb55df27ae4b10d7f3dbe1190b8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FR26V1508762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2255c53b835eeb82cbfcb19eb8ca53ab20ba66d0f2a898c897b0d010b66e2a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR26V1508763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0455cfa8f042e50c7a5d0b5e9980d7923307f07ed16e7c9f62d6687c7899412. 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/FR26V1508786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e3348d6624d2cd6a8d557f42dd8b2d76c3cd125ffa4c77815d9cb91984e48f. 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/FR26V1508741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcffaa638dd2387a76bdc9d07851a9d877088b30d052298d61014b76be926bb. 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/FR26V1508742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7677d3adc90aab64e8bfedf4174d772bcf8717df89ed6800c25f50cb1b20ad5a. 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/FR26V1508744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53cb799968db98c032d05c6c904f8dc68612d0b5e10c8818cac12be7299009b. 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/FR26V1508749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf064002488ad2d3261fe4398ff27043f7265a3747dc3e7950326388d225df3a5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR26V1508752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8909fff6881b98260c3d30e9b21aed7ec78c632c090871a706b29ee309878902. 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/CH6542210641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b6193cc319d37e6e613006511f6f2ef9e8501bda0f7640e4e206d60d60f7f0. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR7OZ2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc977359eaa7dc245e7c61ec2739a6166526d32c67805a0f39308f173b67f7b20. 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/FR7OZ1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2d31f2b557d2e2c53b2543b270db575b884e39c2d893d32fb706e0b478fd70. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR7OZ1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4286d1d2b71e9d83afb97fe36a8c71e03624ea186b75984b8e12c6e623e0648. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR7OZ1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8313f8894bd11606ba82d4f73d79aa76a6be41264dd3786570b69df3c10655. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FR7OZ1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa48a5b4f1aa2c5cf771575b7b762c67ed4680487d6d6dc06e0e7f41c4d099. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/FR7OZ1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d85d63c7c1e90529b2c26e52d84d4bc8309c01ef30bcc3ef1be7d654ef6c94. 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/FR7OZ1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a8d12567a3932f42e6966892afcc81c8831670ffcd68aa2f105b3511b98c3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR7OZ1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b8d0c73831dbb0bb48717214b9cdbc0aad2443968b3a615eb06eabfc58866. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR7OZ1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e65bbbdcaf64e31888e033059ea5e86b391fe0ffb1d703207130695e699bd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR7OZ1900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b14c4707732239ccf239239147d571b1ff2cc4e6bd68442b5e00c9fbb9ab308. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR7OZ2400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c2d59fb3390e2948fc19d620dd78f2b5321cf00a5bc48f63e311375aaf52f. 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/FR7OZ2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3de60c4576c1bdef310c08b3187c3b383e278b898f5aace61f71c72fec342. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR7OZ2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c2d59fb3390e2948fc19d620dd78f2b5321cf00a5bc48f63e311375aaf52f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7OZ2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4add8795136e5c7835fab59aba7ae62ece617608ca4ac5bbf9e026c2a6d9b558. 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/FR7OZ2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa55d8d00573117d1e81417e6ce411997362d975e66495efc721edc47bf09f7. 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/FR7OZ2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f2931c1e4f0546ba52d431c7d6a6449d9ce444ca12f1654d800b480b1b64b9. 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/FR7OZ2400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a8385511db69d15a044dc5d90e516661a0da66cb847ad90f04fa458e4b637a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7OZ2400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e7d2552bcfc360794373588ed3f33d12f626c093d5fafbc6ebe32cc7a5f381. 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/FR7OZ2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b14c4707732239ccf239239147d571b1ff2cc4e6bd68442b5e00c9fbb9ab308. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FR7OZ2400250.
Dub to Dub (High Tone Remixed Dub to Dub)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15bb98f01712580f7bb6a0d9fadee48b6d7ac64eca7752ccb810353c341db49. 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/FR92U1800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6ea4ac6de00697a2deb2a2cdc87c3dc5d4dc410fc835fb7761817857efbba6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH6542020602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c077e950f41a0d0299b51e050e0db76d6bae31f36c2ac4643a0de611ee5829a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR0U91701126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e51a9adb4957f577c2fa4c28e09a708d9699f0e4ff6a08a3dc8b16d1796ea5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR59R1807710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642ccff4f284625bb65f9a944bf2bf13f060b73abbec3e46bec6bd0c8c3b029f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX201935293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0028d8006ed1b7d83c0ce43a361f6f1f8dd9b1c1b7215bf39c652d9aa1aec06. 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/FRX201857727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167b1a88b533eeb84e0ae82d56ed37b0ea963b3dc9354cea46439afabfa637b8. 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/FR59R1669370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb359854aaa24a4da36c11e5844a450c2c3620003cda8e9fb71c3d32a1d8f6f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRX281923440.