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 0x5e5723d650f9bd16bd14017b3795130746026aa534a172c8f424905c5dbbe842. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/100e0e8c-11dd-41bd-8431-7e63dc4a462b.json and https://artists.proofprofile.net/proofs/artist/100e0e8c-11dd-41bd-8431-7e63dc4a462b.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 0x35fe705e91299af024a238240ea491ab0693722ebc420ed080d200e9c4694b70. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:35Z), 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/USC4R1907087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde056197ee24a0a489509b7aa5d221a07c59878adca0d3f3b857e3fa64e7a799. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USC4R1907122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fe705e91299af024a238240ea491ab0693722ebc420ed080d200e9c4694b70. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USC4R1907087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ebc153558475205202ebd247f070fe195a9eca53ac9a874ea91386031ceac2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USC4R1907060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8931d42c67295e91745972b638471d7a49fb98f9f054a331e9f8d79455887a87. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USC4R1907078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15f66b6e4d6662bee27329d9c1f0d2acd702b38b973774d0d683e360f0c0c5b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USC4R1907163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb760030ce4ee132090665d959c4e53f210065032ddd3ce46ed79fc028486f656. 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/USC4R2228049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb760030ce4ee132090665d959c4e53f210065032ddd3ce46ed79fc028486f656. 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/USC4R2228049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba981cd56b43326253393ad9ff3c35c16382bcb90f7a1aa4ac1f564c5e64dc76. 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/USC4R2228045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b14a08ba88e363791066e9c6583b8dff831836c30bc98c8856b964d3a6f198. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USC4R2228044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab62750215de227636dafa867b275ef320d0567f4cc2629fd090dabb16ca130. 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/USC4R2228046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ff9c41ed5be14b4814a363f2676e198d53d9f2ae9eb2a5c087ba13463e7e4. 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/USC4R2228047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dff5247db979f6e3f0dc8f86466da8b23acb475e1aad792826a4071ec092c0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USC4R2228048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809ccbcfa951fa68952cd0733aea2b79d93061d792772571b39df55ca028c9b2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USC4R2228051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a414ae60643c7c7b5196cdcc9111f8b0fd93a410cfdd43250f7cd46a0bdf9b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:43Z), 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/USC4R2228053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49bfd95c9edc741b59fbad0d05cd49cde5a1e77d832c69aac88212c04edb271. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USC4R2228054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aebd5682cb70cb57629d52c2f59cb72ff427bd579e828b1ec3ddf6a0e52f913. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USC4R2338184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6c35e0a99666077c8ba1c659ffb5ce879f37093410f4f2b13a641e5eaec580. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:16:58Z), 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/USC4R2339142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b111e708a682c82081df658c652a23e0cbec302f219958ffa3653810ca8d621. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:14Z), 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/USC4R2341060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba981cd56b43326253393ad9ff3c35c16382bcb90f7a1aa4ac1f564c5e64dc76. 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/USC4R2228045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ff9c41ed5be14b4814a363f2676e198d53d9f2ae9eb2a5c087ba13463e7e4. 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/USC4R2228047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb9a5179df8fb65f6c47cc5d8d0f1839cb274fb8fad99beea716c456a81f20e. 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/USC4R2341062.
With a Little Help from My Friends (with BAILEN)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1355e24292c3e696b0535c380c9097c773ebf0344deb50da1eedf38144b6e58b. 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/BXRYB1600151.