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 0x19b681377183d6142049cb5cf5a62d3c4bd66f6394c1133bc4cbe8380efdf561. 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/a4265388-5903-43c6-8800-b627038c3c73.json and https://artists.proofprofile.net/proofs/artist/a4265388-5903-43c6-8800-b627038c3c73.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 0x4679d57c10c7a45cca17c31ebe7e8a92121dbe9c24e4fd3a22cd6f3fa40dc603. 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/FR59R1950097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d888e21807196759525d8a8a8f122e331819eb1c904982595ff8e8bfa2460b. 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/FR59R1971026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626cf4d0d642b7823e8525f46a779160120b0fd8f3514b4aa148ee1ca82ba8d4. 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/FR59R1992945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21d2cae09fc22aa71f4eedf5537063a30b7456159ce4ce4f6a429f7463dfa8e. 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/FR59R1992946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e8c1f6f6cc7f1caf55adc40c3771c131acbdfbfec9c63b1c6c532bd5270348. 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/FR59R1992947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab4f53798d7ace80f1dec28849594c886533beac7843fca6fd08c13f0538c72. 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/FR59R1992949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0fb84aaab476bf0a024d31d4acba6993e4a18bf2d593433fa0a6f4830efb70. 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/FR59R1992951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2a27feff9ef2c70ad2d427bc5e09a4e1f88cb665b57b6d435f28e697c4d925. 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/DGA0M2475435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42a4623d6e27a96542e894aa6b740cbb35e56da5c8f247a78d1de706c58502. 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/USCGJ2351775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a489ce6b69df2b6d2fa31257df0ea006188f275dc7df17ddd395f38e945979. 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/USCGJ2223834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5230078df65a9a066a722472069790de08753f697eba3c65cfc8eb32929e8a. 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/USHM22192137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5eddadea8111e0e2eb4bbd4e35d4a4788a84c0d618219d70a674862900709. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42177585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0e2f5058ee6a5e379a03379982dbb82a4a1bc020344092a61524785e4d67f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4R1930936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0115ba7bd094eb1a176c74160ea3be4c9be1520ab28a0b4f62c9068c07167d98. 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/FRX201821691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a66c70d05dfb4615fe3b1dec5c769d339333a47c9e1e27755b35c4f1267adc0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR96X1882460.
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 0xbcc054070ed9df9f7d81d23c89955e84a90d1ef7edef0f1c132427e444bdf564. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX201821690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c627fea529ae3d41145bc44d1fbfb05f54920d46b6fc0962b2ea6d5316fa50. 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/FRX201821692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89093773a488e086fde19ebcae1eb174038765e9280e4d17db528a174af5681c. 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/FRX452197218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311cabf25fc101bc7eb0b70c7c531aeb0c0f7be1fcd1ba504139470e93734e24. 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/FRX452227042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63862d64195a76c2e7b58f801803a7a1742ceeaf4eb7e6b996107fa96cda8ff4. 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/FRX452227049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00425be57d5e13ea4f2ebba94f75ca987e3a5871b6c784137a02aba519eb3914. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX452227041.