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 0x5c6f41cfc069688299b85e6fa122a3032f48d5175a6d4462c16c4f27fd96a2c8. 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/1f10fabb-9b4e-4462-8fad-b47f86f5a39d.json and https://artists.proofprofile.net/proofs/artist/1f10fabb-9b4e-4462-8fad-b47f86f5a39d.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 0xfa419b7eefaaa859b0e083770eaf72d4a809311f40b745d8bc3617714201a9ae. 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/CH4932000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2f3607ca03454f583baa5ec6f10519def12c0e5480a2f495d2ef8faa8a79d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH4932000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d04a5bf162430266039f4de84458033c9afdd25e5b133cf1e35552de87241b4. 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/CH4932000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b1666c5a6fbafd5238d9bd690bec1225a616731ed607d642ab679f44159d49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH4932000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08956c7d728ba7b3095c1e0c86115b3e9246e779f438e4042cb6fe87f44e2ba8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH4932000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c607ba31842bf8282909fc80742cdba601e95729ce1ddb64b3a9cf152a782a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH4932000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfed17d78200ed2d188d5fe8bebdd153befd40e52e884081ce32a20b773420f. 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/CH4932000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510e8372b4297c9a33a27816204039fa5f5c9fd003e437a481179c919b378323. 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/CH4932000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf4169545122dc44f7a33bbcaf5a1e972157119a4832e3afb35e4814672f957. 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/CH4932000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47b34fbc395ede69b1512556be9315bff02d3a0f0788272d49b165aa2b20db. 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/CH4932000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a970e1ab6ffb819fca5eaf5d81bd023dca1e8aaeeaed76c7c6a9da8401345c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH4932000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d36bbe4acfdca3aed66fac6bc1a1c875d6c5bd6af5374566a432893fb86d46a. 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/CH4932000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89920f6c5da6ba719e3916658ea3cb5e6ca548c5c917c320103efd9abba103ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH4932000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c32255be6966995cb1be7bec1e97862a9e663b5c54f7ca338378c0eeef0e3f. 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/CH4932100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb34501f4b32b03611594daacbb14366ee493927b78403c1e2b6e365a433bf8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH4932100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e4f4c5276b94783c76ba721f97e32e49b58df7050093d836476b7572d70d7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:17Z), 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/CH4932100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0c2ca0123c820d41a2ae0a31aceeb97a7d046b64067255848517807b195306. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CH4932300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0df5caf81a9c40ea3f13cb4e328b9226e454402a3cd6c404303f5864b3028f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH4932300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980c5a46ae76a21c795aa1bec0f9bad5d5b0f7bdda83982eedc6bf665cc3f176. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH4932300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c73115bd62cd0a409b6ddff5f6051e74d5099263d8120d8b2c9953b3f56f3. 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/CH4932300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d220eb02fc12f0f438f88d0e584d5952ab631e344c4dd262cb6cf4bbaf3a20c. 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/CH4932300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07646af71631dd911f779f72084bd43f8677b414acf220ffd9f354461bf30564. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CH4932300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60fb66b08a786a593dc474ae2b9c4316bec7c606a1e1f652cd54f5ce77086cf. 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/CH4132400117.