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 0xf60cb8bec03bb6b4a820473681b85ce4f7d3b56adb693b8161c5b3d2daf066be. 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/3e7e2a31-1e33-407c-9bf8-c7266d9e3e7c.json and https://artists.proofprofile.net/proofs/artist/3e7e2a31-1e33-407c-9bf8-c7266d9e3e7c.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 0x2775ccb2c27d3849ca65266e69227754d078889bd297b2ab0ffbd3e3d6203814. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282366555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877480b549055d75f8ea159c10159add96c837fff48944aafd1dca3e9912b4e7. 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/FRX282366556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb804ef9201e08f0f07795c9f5fff9a74f594fe813830fdb6a461980289f95a3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA062476121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa590eeac7c2bdc1eeb46fc544bda08a2c23c8a869554acc3ee8845d6cfe5a2. 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/HKC992424552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59344e4778c695f29311b51077478d089f44420a056f423a135ca867ccab889a. 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/HKG732426953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b52b0443e494fbbd2cf25644e9261141f90beb9ceb811742f4050b27d6bfec. 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/FRX872476545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65af95159437cfc7d68c4e966126fbaeebbf4082bdae015e9ebfce14d4feeff7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX762497632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6056005814ff2c7c78b219ee6fbb046c11f9859b8a7673da4ee7409cc3027406. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX282481165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e5fef12efe08524b0b8e15f74df129db5b4f8135d4d558c4706aacdbf741c. 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/HKG732410036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb1a4593a22cc0f3065158e7a8d94341d393e19e33915b8f272eaa916792a48. 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/FRX282462238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd55f09278dcbd063a5023be5e830404c7f1b15086933132515269cc6ce8bf. 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/FR96X2451121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee388275ff00d9f89e0a8522c99c0d2e532c8ecb42938fbd2b1e667df3fac9d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR10S2475261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd2c9dc35698fe47db165ffb85a99a9f880806db3e3b03a9ee08c1a17800bd. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR10S2458768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8acceeb75fb8d92468147430734a34db2d40eb231036f6b91d29f16d2070e7d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR10S2434036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31898823fb344577f2de0564dc3641faac4821b32c9c35217569db842f95849b. 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/FRX872323434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fa26741076938b286e4fcd9613f77c61adfa61c7670f17556edd1478c700cb. 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/DGA0R2322550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc37eb2b7c69d8742c92a79fcf29b868701c3e180561f8f45160e418b111710. 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/DGA0Q2372655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9906ca5a82bed39c44c234521929e03c406c272599dfd321d14ebc4d0c25e3. 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/DGA0P2375545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6c066a7a9912d2b4c2b43c3e4d0212bb0143c30a71e5d7c3a274d96548b7cc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKC992325736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ea779761583f08822013435cdee12ace80033a2aa8e6de1613e4d0b2502d1. 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/DGA0L2388787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c090755565b9017877dd6969daea8032312bc27024eb9387b7e6e51f7e3b9d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA0H2360059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68cae863abc2948da9650ee8fd313a07bf19e9d579651c5f6b5e9e471fe5bef. 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/DGA072388724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd738ea391066d47406ee3fa23efff23c4c6aa86261504877fe41884d9574e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DGA072388725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe584481837559f6241a7a0027d260595a479258eb46e6cb0cee65e01aea5df5a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA052326620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f37b4a0828401ceb1ea02d18ab2c272743485bae801d55a13f2ef4a6932be7. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRX872341391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5a6f579685a7313bc156a000fb1fa8a70e5dd959b67db23270bd223fc78381. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX762357366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413afa3a4aa2792f64d7d1d4de5c5e064f77eaffdfa636fed69ab18784dbe42f. 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/FRX762361966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c29e4cb3f59bddf50a0d1b92c5adbd978490d009916c18e81d0f7bffe36ecd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FRX282353584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073bc8b953e3dd1ee6404451a718c6e2bc34ce835fd6c0bfa0bed6a257f389d. 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/FRX282305778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454dfb9b3e5a2817addba03bafd89116c34473067588a9e81b0c965d5550d3fe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX282356237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda05b032b3c4b613c295b1b3bc67faf9b38302ad48437e8554e8fa1a693c5fac. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR96X2356499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05ac4ffb80e5887346b17db0912b35e3e61f892723e4fb4855e8e389f7c4c95. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2321809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d860642ef8df88bea2d19c64686fdfc6a61497bebdd6cedf988c4c629b0217. 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/FR96X2347560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba7fc5e5594a5d81f766efa32359a55d6c49401f877006c61f041c05cfa0e61. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FR59R2350968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7543693215a25658f41ef970d2dc250e2f8226f12076d2cf064eed85c293865. 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/FR59R2350969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5352edf88a5a5cf602107649362e485c7fb0b3508c6d902c1c1cb66f97e89667. 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/FR96X2307085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea9748417eb3bebcc951353323bcebf2a60afdfe81ee903a8be7ca2e332774. 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/HKG732271821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e90320a27b8144260d1ab04bc4b0e8e9bd90eecb2a4534e1a02e05ca70f40fb. 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/CNZ632201608.