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 0x6c431c5a462aa0272f61eedb2832b0ec792c17e53a4ccec8c5c332a2977e1038. 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/a259148c-4fc6-4817-b662-d45ecab21a9d.json and https://artists.proofprofile.net/proofs/artist/a259148c-4fc6-4817-b662-d45ecab21a9d.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 0xebe89b61157a93dbe1f4d5347008d8cab1dc751f23f0764d1f91a88b154f9d36. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SE6I32427706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5cef66ae3c06f605520587995869e493cdf924e3d875caf4d86e425f16b14f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE6I32427707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04217aa9379d706c1529c387205d659b70ad927b811923a682a2a8a8ab07298. 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/SE6I32444971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c98d835c8a3e919aaa4104ed414b5f82338e905099e1a90da5dfc1b3524057c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SE6I32449366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a33608d9afc343a6a96c9a87273810390119cb6ec2edc0d1281d089f49e3f9. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/SE6I32449367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d712192224ecdc74faecd28712315cff301587e712f0b8be3a90604ded0d9c5. 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/SE6I32449368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f3413c13a9e4abada21ae28944933c5ac1798644ce686d21cfe3784d6d9074. 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/SE6I32449369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248fdadca124a083fc89c7fcf16c1be9e759505fdf74d322e88b683cf2607d03. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6I32451718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba066812fe4149c0beca0ea844e2218159cf383821b5621d843d11ccc6d580a. 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/SE6I32451719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c4e36edfeec4299ae055a8609e33885a5d5eab2443408c5b185a123bb935d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE6I32451720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12abdb88a5ee82043bee39e26fe4d2e9d03d5011ca084415bd914793c7c0bfb0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6I32451721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a31b8ef14f3a3f02493bd8cd32eb886efe625ffbcbb3b718e544d44f44656e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE6I32458583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1896c789789923a84ea4d4e8ccdd3efaadfb8191615cd70875aea9a9d8ab4a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6I32458584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e257ade9d3ed1d303883118339c18ba90279036b0117c84cfae47d616e7e66a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6I32458585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcd73b36e068ec00199cfca6d14a291c65f807747421333fe24b6c9abaea07a. 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/SE6QE2453992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa11cd710b8b8952c1b54ef18e9a6c15d09727a8267af1d7632aa845d237ee8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SE6QE2461005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74a0c5bc37e020a29fa680b1284a00746aaf93500dc57e28ad512d39a93c247. 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/SE6QE2461006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb539cbcfc400114e6d5f681948eb1e85ecef523c2b5bcea6a09f07a9110a194f. 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/SE6QE2461007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25a4e98b2c4997beba06eb9f6f474c751878d74b537f731082e1b169e19a127. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE6QE2461008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e87f30c5ada10c1873a4f8ebd986a21c2d34534812a40c3334f1164fee4f79. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SE6QE2467619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148e83b423d0d514a8ed0e4ff6f4841ba6210ae324f08ade6a70dafaa76b072. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/SE6QE2467620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687289eb54c147bd4e1d557bb4f3b25a4b921d65a9f7666b14f6e168f735e008. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6QE2467621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd9c30cd1ec72a2e8fbddc7e37e3f372c66b14243baecba2f232c77f2099b08. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SE6QE2467622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436f5e499bb6edc4a1ec053e6b674e3e9ade13dc03c050c0b4e51fd787e1eaf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6XW2423949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139f7ac8bf415b11554bea1af01c32d75ea5a3e27a771ccf083e828c7779e24. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6XW2423950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33557ace9d7b85828ec7c64247cc14bebca21c29bde1d14c99f5b44c315fed96. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6XW2423951.