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 0x8747f76ebce400c4af5de89cbd439e118cabd9ef85ace752fa91c77e1d379102. 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/ee900315-6853-443a-8156-49613dff5e42.json and https://artists.proofprofile.net/proofs/artist/ee900315-6853-443a-8156-49613dff5e42.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 0x389b3a8f1781798bc87e97426f37490d892e5588bb65ab8af19804c536f058d4. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:58Z), 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/NLRD52069621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d675a0fe8a7719b1e1cb42a27e5d563f3b58bce20599556c163fab42f36ba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLS762100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae4f00e16898ee60fea4312698873053677492207f9ddef0e34e45114faa94a. 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/NLS762100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3165ef5d814b06fb5e28a5488f64cff3c5d41efbf8fad793e25fe1f7248a3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/NLS762200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22d06ac7632c78028bddb3b81b4f743429268fd6c0c180035b55d2d3a3c094e. 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/NLS762200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4f8ae0d5fcfa65b4b39a97c0c82116ef62c35022e0d7d059bd8fee939b377e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/NLS762200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d8ec68b468bdc434a12c16e96543fbde3e8d8344f0dc6c3b487b8dfaddbe47. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLS762200479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bf00f46698117b863b1367db7b0656beabba962310ca9e41a11e25769b8ad9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLS762300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9028c37a0f5c73093cdebe449d9f03f02dee72a94a0f96da3062ad29cb797e0. 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/NLS762300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883948cc8bf2d2a244b0ee5e8c8eb9797b2d7a7a377f431ce7688fe8588d3930. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLS762300206.
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 0x97add25fd2a2233c79cf60159be4488a79f0058f2f1d2e58184f6defe2073e5e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLS762300588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78e436c30b98a39bf59d30af3632548d47135da804269b8db18c60fe92ae1ad. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:24:48Z), 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/NLS762300826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f434414efc82238ee209cc5e5f17c38267165055d4dc0c0f74cba03f5a3ca6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLS762300897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bf466c3d1689b7e215d5411676e1d498cf2584ea9f06bf826a7e6a71b81ec0. 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/NLS762300944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce7f48c2461c9de1fb7ad6962ea66775f6a112d6e7d76d8f10e5f68c46065f8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLS762300953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5866948dcc4720e4deacec9bf69c8a755234b4d224631c0a05ea2ff49d2eee. 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/NLS762400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ee997d6af07505731297b7ddbd0477bf3a50900352648fac3251a34bd13144. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLS762400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe641e6cc96a9e74b80f5d670f0765c2e30422bd6451b55416a361cc2188aa52. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:43:31Z), 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/NLS762400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af64bdb9a4dbe7e32ed3d09602c614535bd4d94f44ea334bdb79341b7325d3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NLS762400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0e92e93174d5432d5fc3a4afeeadb1bd10c8e6b4da48406478591e8c14a458. 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/NLS762400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e63b79aa2ef8a1d47b285e7b2e368ee41b6008fe406614a974d629dd0dc1601. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:48:58Z), 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/NLS762400418.