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 0x609e976b73cd4f21c4a00eb8e1050a31f1effc595a92da198462dfe2f9dddc3b. 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/65d51305-3c2e-43f3-ba45-a9596b1b233d.json and https://artists.proofprofile.net/proofs/artist/65d51305-3c2e-43f3-ba45-a9596b1b233d.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 0x933f5b9ce4a28ff3b214fd47e2ad75dac5e6396ee637db2142a654d635872556. 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/CA5KR2472615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c3badfe2d25f7f453be78331881a54ca927d826845d426426a409c662cc03. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CA5KR2472616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd313c42e6cf708da5fa2d5e5a0067bccde73f298b7fe965fd2379a42ea39e1. 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/CA5KR2472619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467c2d2c6b4d3b54f6f3e30100c70e6bb81e86aa1a430d4e7232724abd4b1a78. 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/CA5KR2472621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f134085fca1d6b02a288915d7d6eb5c989f48403747e4726ac2ccc8903fe7fc. 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/CA5KR2472622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee67a8fcc3eaf4ad30313c4be348feef5174419a370832aea4416a2dcc88c9. 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/CA5KR2472618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076541cfdd7cc8837c14994281fb956d2e2ba5cb96f84f7310a71c6859262598. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR2472607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2230690dcc2ea2fba0d8fc0d2060d58e03d9619647d8cea1a3a7a761944d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA5KR2488039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ea6d83039f66f598954b764e05103fac70284abef896da460a449d57191aa. 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/CA5KR2488040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d7d205f4e898b2d4b715dc0b478948e30fa4c5b4a55abc432d0856ad076b47. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR2410744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7691588dd4ae46734414b2aa8c185c3fd8606a97b9306dae65d3f2078db79e. 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/CA5KR2405651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed64e84ae849d837673b0d822ce09c73bf79301757532714b449e7057131e45. 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/CA5KR2472605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb136ca6060901cf57e2d37744d70edfa5b716e617ee6b7e4653704a829dca06a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CA5KR2472613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb743ea227d8c95f90ca2d22ca2e6c14bec3f63dbdec81c4ae161d2b8d586bd3b. 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/QZTGW2400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9086a407bd2512713c0f08dd112d31e976bf1bcf629bcf154644f36079635f7c. 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/CA5KR2460687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938782bca2ead78c9b460dd860583dd0ece64a1bc4aadc70f43b129002651bb. 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/CA5KR2448857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591181207db106461c7eec6b8776b24624d573a4eab9802fb1fb39ed99f4918f. 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/CA5KR2448858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a035948a5004cc7fa468dade7ce777dbc4fa9ccbc5f7cfef0f44cc9fd0cdbc8. 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/CA5KR2448870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6a173411bbeef7af1a15d40ab142beea2ffdec454c702021c43470a824af8. 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/CA5KR2448855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938782bca2ead78c9b460dd860583dd0ece64a1bc4aadc70f43b129002651bb. 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/CA5KR2448857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6a173411bbeef7af1a15d40ab142beea2ffdec454c702021c43470a824af8. 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/CA5KR2448855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a035948a5004cc7fa468dade7ce777dbc4fa9ccbc5f7cfef0f44cc9fd0cdbc8. 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/CA5KR2448870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9086a407bd2512713c0f08dd112d31e976bf1bcf629bcf154644f36079635f7c. 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/CA5KR2460687.