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 0xa4121a081c2d40826293cb287a1d0062873aa15eaaa0675ca5a6bdd68d976904. 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/b13ff23d-65f8-4122-8aab-c77ede3c26c9.json and https://artists.proofprofile.net/proofs/artist/b13ff23d-65f8-4122-8aab-c77ede3c26c9.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 0x91dc7e23056b8ec4486978c1a9f61b48d1fb9eebfe39f430c023018e8d27e133. 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/USA2P2351971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc6e07c3b262dae316333096a802f1ff5851eff618a3ac01cda1edc76d0d901. 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/QZNWT2282332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631a0bf7d2ef1cf3f77376b6d852c9065b6e52b24e80e27f5d76636a095fce7. 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/QZNWT2282333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67426b30669ce1dee3001217764cb866c14e7a6c5673055df72f2532241838dd. 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/QZNWT2282335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a60e2b39465a728406192733c8ca7e5aa221e619da38c56f732ebd597953a. 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/QZNWT2282336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be385beacfcf93f6997283e89f535ff727af2d9fc76a71f471ea2c3092a6e1. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:49:40Z), 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/QZNWT2282358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aeee976159bf5f81e681bdfa936e66a407b40c077e9262ca2b74e7493aa3e6. 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/QZNWT2282360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c2ac221b59f61c3ad128d41573ae3615c2aad10851f92bd711e616e196038. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWT2282362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f3b5227d7176a234a6afbd5a7722997a7e81b79e89eaa80d8ab98d1b5a9f19. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNWT2282348.
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 0x1a5e740b139457614a5e4ffd4b58225ef8a1ae16bf0f6d20fc47a636e1176c8f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZNWT2282356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c631c097806f37b04c53edde3e5b2b202612e1b236d0380c43346679c32f47. 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/QZNWU2271043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5783a9866060d0055a493f60898f49838bd338c4eff71ea52b16c6d2480f56. 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/QZNWU2271044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f2cf18e7f88c7001832686665067a2d3812eacf1dc0cd01b8490720ffd9b40. 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/QZNWU2271047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd839030c0c43bf08cea27ade8306c1a8480696f4e12d01721a203aece58dc9. 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/QZNWU2271049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13644011ef5a8d854eb660f14d08a2064b610f08d46d5d91503cb3bb80dddb12. 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/QZNWU2273506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522655b08c86b7cde65ca3d04517aef2884cab9b68405b5ac9db2856ff131671. 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/QZNWU2273516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959864d474a19131f8b180d730e9a830513058b4de2d3f4a89ee4ee5a7717046. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWU2273509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa232252ef47825952244bbed8c927b14085c2641f75ce15205d74e51fef90b37. 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/QZNWU2273555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581d69012e12283aacdb171e0b1e9cf1912bb770b67a36b03a38633347ec477e. 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/QZNWU2273556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312a0b4c0de109c3f09843af48873abb5709163120f7d8b828b53e01bb22e987. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNWU2273557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f50e42cf8f08ef18b209f01ceb59e081514a6adfc8072d9f8173d45a229fe1. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZNWU2273558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5af27e0cd330c247aac0a0ea92426537406ab8705069e70e0c39b63be178cdf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNWU2273559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf27253a5c0bc534b9eec89e636fc50a316fa5a6503d047f5b090a08ddae475. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2404236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3b3c980f63d96968954bbcc37f828df8dded1a01f081be6955b7ceaf5a4e16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2338763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5bf373f722525b628dfa3023ffb5a145515d370b2e55a2a52ed7186f469175. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWV2283508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b8a1858fe0d482158fbee6bb842e60db05d2fa62c2827351e332867ecb1c01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWT2296719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffb99015eb4fc87af7505a553612c286e4149c168437a7c55ff7356e016b3a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWU2273481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85b78517f3f3bdbb3ec6a2d5fbf19cf324a5aea2b61fb3cc9f287487c6de630. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWU2273502.