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 0xaf93a778113900d562d838be938e6ce4e5a444505a7f2057571fa3dcd5a63b52. 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/d046bd35-83d0-49f0-b354-bb45303e676c.json and https://artists.proofprofile.net/proofs/artist/d046bd35-83d0-49f0-b354-bb45303e676c.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 0x33e3176fd100adb0546579b2d3ed15edc86df02bf1b39c44b7e787278da8076d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEY471812299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7830108f1f8458a85716d7bb6c3e11747c0b35375e4dc368c5457962f5c6c5fa. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEY471812300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d9a38f0d8987ad92302ec7572f01e703106ba42d3e4c7ac5eca35c1afc3c0. 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/DEY471812301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa931e5d4da27e211ea83d93e26cd26fbf513bc92569c6f4904ac289d7ebd0b23. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEY471812302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0af0e729698c803d9147cf938a15a1d85ccdb2d061d8bd03a3ef7400ff352. 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/DEY471812303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b66d72e1559df05c0008e9a2f81c6ef1bd731850a3963df0d4a9f8078deb3bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITRHE2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c3b339ab4e726da7bb49ec1a3d873000b4e01ad38dbfd586675958b92beea9. 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/USHM82301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35326f1475949ba4a47d2641b69229cfdf19e16f89a6bb235a413adc00d6d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEY472179777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8855baa5fb168be6093f7e1ca5ec9498eef7cd070dd11be318c79df3edc2fda1. 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/DEY472179778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68519022bdb1c4136d1a437f1a7bfdeaa803e2a4dd520051725c433c0dfe56. 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/DEY472179779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f258e81ef39c83f555d0f63a6ebf1a58509656033a3ab06fe9c61cba335b6d. 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/DEY472179780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c305b002a9dcc0765a53605fcf7d7bf658b35697eec94348d0101fb09364fc. 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/GBJAJ1901314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44680dec676b878d935ccc49addd9883a7d3f830871379b71d7af4a717755901. 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/GBJAJ1901316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ed0ae0875eaa7a4bccb8ae2030e104776d53151aec7acacadd787b855b9d1. 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/GBPKF1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ff6275e255f75cffcae6367d0a9ff8b82f91e2a7fa06f826980e5a7ae5350a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBPKF1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a584cc1869785df6847b7ece4a4d29aa8377a82b7bf8965d05da397c41f403. 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/GBKQU1867176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b430540edc6ad1eab7bb0fb73ba27a3fc45b582258650f2bd1b7306a20f8911. 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/ZAG8M1800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7aeea9337b008ac93f786b53166033e03cc85f4527714c9c5ffefab3dae206. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBKQU2061163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65d718486a798228b3e3afe00b4de337660f90940b96f00ee6a7b39df8750e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBKQU2061164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80727de4c0c41ee4dadddede2cb1f769e63d8f490e686cafb9448ef85d3d56. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBKQU2061165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae36f139a4f1ebd99361f6d869bc04a1d7c0e08c79888a62761cec0c2a1f80. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2329762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa31fd66be1d16b5bd0c94da4f940a20255233048ea65928e3a17d253274e0a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKACT2031572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47e057af2182b3468a9e329437ae9b0d45e407b2099f394dc127a2a657b20bf. 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/US83Z2343992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c42ab3918a5e90c99b6bd5519787ae2e577d7d6771d306e54976f5b7d2b2f0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2343993.