A Certain Ratio (abbreviated as ACR) are an English post-punk band formed in Greater Manchester in 1977 by Peter Terrell (guitar), Simon Topping (vocals, trumpet), Jez Kerr (bass guitar, vocals), Mart
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 0xe3288fb0c69b9f83af3e6e58ca763a5c29da14ffbf787207274129bd0e078039. 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/826d4c5c-add6-4ac0-9456-4934dcbfe39b.json and https://artists.proofprofile.net/proofs/artist/826d4c5c-add6-4ac0-9456-4934dcbfe39b.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 0x2574b648ca1325d883f0cf652784e4e4856b29478908ba1b140a1ca3c3cde1c2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GBYHX0900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6818da45d654148af82a00e7ae42d6661c51e4680470c0bb0ffda9be021f489. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBYHX0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454c3e431ba32a942628f61c2b5e57d585ce55de7e5782206ff28efd60a8761b. 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/GBYHX0900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd4b50596cf3430b8a099d08aed4c4510ee4f1a3691a721bb9d424fd2bfd436. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:05Z), 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/GBYHX0900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec9a4d8a9b46fd918a60bd8c8403bd11e7a529256ceda96f09e769c222797e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:17Z), 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/GBUM71703331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2574b648ca1325d883f0cf652784e4e4856b29478908ba1b140a1ca3c3cde1c2. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GBYHX0900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc0a5d28bd8bb8fb2bdc359a827c587b25a3ddcaf4a3c57d40faef9163fac2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBYHX0900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b0e6cda61982021d0dcab97e73daf15bf4225dbcb5d48e69b3bc82eb4b917b. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/GBR8R1900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db1e6e12a27ff2fc3c6d03abc73a9b89390f01c1c39b30f67365f1cbf439e93. 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/GBR8R1800766.
Dirty Boy (feat. Barry Adamson) [Chris Massey Mix]
Dirty Boy (feat. Barry Adamson) [Chris Massey Short Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24874797dc525f47dcc02ed8faf11c59225708a09339b1554a5c6dfc69f6ab73. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBR8R2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b15292a65bdc9b14031227989da88c824ead914b9a023cf0620868ff28cdc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBR8R2000055.
Emperor Machine (ACR vs The Emperor Machine)
Bouncy Bouncy (Chop & Drop LoneLady Mix)
Waiting on a Train (feat. Ellen Beth Abdi & Chunky)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260d045e6c208e018cebf839ed439674be1f02079878819153fba7dc13d84731. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:51Z), 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/GBR8R2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00533330f889b682b2146f0ec41140d68b5ab74847a6e938dceda1a7cd8bcc71. 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/GBR8R2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614ca1220aa63b5a2cbc86d4338c4644dfea036ee0743178966726a7c879c43d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBR8R2200060.
Constant Curve (The Emperor Machine Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b0fe32bbacb762443315644935f825b18d1fdd2f4060ef0e2baca21227fc7f. 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/GBR8R2300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db1e6e12a27ff2fc3c6d03abc73a9b89390f01c1c39b30f67365f1cbf439e93. 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/GBR8R1800766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454c3e431ba32a942628f61c2b5e57d585ce55de7e5782206ff28efd60a8761b. 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/GBYHX0900041.