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 0xde59f8eaab32fe6c0bfb1997638432849ee750d2e9803f249f00fbe00b01a290. 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/9c35d758-0830-46bd-8329-cfbc56b40ab0.json and https://artists.proofprofile.net/proofs/artist/9c35d758-0830-46bd-8329-cfbc56b40ab0.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 0xe745457571abbccba839432ed722d77ccbec794c82e6310b3d8f7ad4b3cbbca7. 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/FR2X42581849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c317d0be4c72b67ef818ceab71caa2d20e2f86ed5553562313b83aa457b72af. 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/FR2X42581850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d108cf7d3fc8ced7b8d6df641f33767b8072bd1b7e9365660d7e85c02f1640d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG731402002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656f9c368fac0f6a4c7dfdbdf85ef68b3cf58de302f7f36d7f662c26fb586762. 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/FR10S2508986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c958c8057f940a022c8de4e4dd8e877c8e63c8d3f65a747cea6a63072eefcdf. 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/FR2X42519781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94129dd0907604deee2cca98786dee84fb369f873b5e7327fe67b27a2023dedd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA0T2422131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59b11d29a62c2c91aa97528f69931dbd103cfeeb9740cbd7f0d0cf1bd1a2b4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TWD252400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d3e34f20b502672194ffd8169f9a4b0844db65fe9e13f3e27ab7e86e0fee1d. 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/DGA0S2478866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978d639d4ae8d4d64f95c7d7392cee59b608315de63fe09e72882946c770e669. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DGA0S2442151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915a4f1ad566ba2a7fa19ad4d08e9703f35862769e97edb859f9afdd385b30d9. 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/TWCT52438676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc6cc5c26319177ef2f2f23df783653f144cf704c9fa3725afdf3c8ae253cb. 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/HKG732486539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf297903e03bde754665a47ba2e5584b1f4fdf451ac41d1bbe7c2b0c0bf871b54. 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/HKG732486540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adf11956cc10a2f6ec9b4525875331b2e1b7f948aa8725eb7c73381f41c1fd6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG732492750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b3356ca4bd51c4dc6e2b77fc53ef5f54be712854c9cf6f87ece38479e6a563. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DGA0Q2467089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139fba0772703db0119ec151501b3f45eecb3bb365eb4315c61f8b2238a3b9ee. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DGA0Q2409505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0b62f9ba781c2450c35df21767055adb176a38e0fa80d87cfc15a7284da62d. 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/HKG732467409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdd9636c24b65ecfa7776432915cf1ede1c491bde855c5b69e59886fe7e500c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0H2406816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e93e834674b1e69504a96c95a7802bd43dca05e6db867b54800d2b47d9c9a30. 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/QT3T42400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413f7aceabd96bb2a79f4cbf907d0def02fcd539f9747f80cc9bb4cc5f71ac1f. 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/QT3T42400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbcca1d117d8bfb5dbfe8dfbe8396d0857497835967f546921e951546041d0b. 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/DGA092413796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f037d97699f000028352087eefec78b5f8a58d4cfdb889e32b1dff7625abed9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKD012318655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2bff62f78ab422815d91bee0bfb8d563f0cfb70628483f8703ebb527c3c65f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DGA072454596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404f7643bbb218a7b57d8b5abd89f60bfe26f41fe9a1f32c9ca3a03956c5450. 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/HKG732434296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059e41729b23b4a814537e13e69dd85ecf746efad9bddbfd43ae1f52bc2a8089. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DGA062449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf1bf3d8331993ca74afa8e10fa6308af01cbcba83e0a2bcfb488a7cd5b200a. 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/QZJPM2480240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf293dc280f7c95352345180af5967509e6b975fb7f552db852c5aa07929c3f8f. 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/HKG732414268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6163d9148037341a6de3df848991d19317aeeb8216b4c7106b7d0bbaedb084d0. 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/HKG732428168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32cd025ec019e262f72e655fc30668061b0176754988a53bcf3f6221fc60f8c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA052447589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99c1b054af6467be1ad0452ffdb167b0399b83bcd635133a038d1a08f0fd39f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX762497235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ddad59270c82d2f083503f7def2c56413f2668aef341351033592cfeba52ff. 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/HKG732469496.