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 0xa4de472cabced55c5ad1ce24f72a351d26b71497bcc5429bd90fda3e03c3a7bc. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1fc2158-1cb0-41a8-9717-1f98a449e097.json and https://artists.proofprofile.net/proofs/artist/b1fc2158-1cb0-41a8-9717-1f98a449e097.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 0xbaeb510d675bc59ea1fccf522891618e1d95320cbb7b21aa8ed8dedcb2cf020a. 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/TCADP1866966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96ce61661bf41f2e03e2b9dbff7e43f429c2356371d6c0bca71bd8a141839dd. 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/TCADQ1814770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd255920b01efbf20cb5d506dc299168e28513a083b69823e7ef82e684203792e. 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/TCADQ1814773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf98915e7327c67466d09abfdb74319ddc7a9ff161a2762e9ed84f6e6e7e14f. 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/TCADQ1814783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe692a015445fb8cc40caf648007fa3db4bb6e0311951a52f96251b96cacb403. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADQ1814785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de3ce896b94780f856a0acf929a3076b7d00d7ccbfd1cb62bc1f726d5d2165c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCADQ1814790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b765bb697e18f129e5953f771e8ad7f65928ad9b808bc83d176a8c19fffc97. 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/TCADQ1814800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749fe49d98d17594ba4b735a42862a3ab447ffe284578c691d8714d3bd1ceb56. 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/TCADQ1814804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fcffdb751b04ceaa05cdb54bb19ca5c3c53377d8ad89b1641273462dac2675. 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/QM6QV1510003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6ef46c41b48b3975bcd9fb5d539bf2f2168309970ccfa918d17490bd9e7e1a. 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/QM6QV1510008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c51aeb455cbb93f4fa7eb4f215f1a0d05d2c5c3571a255dfada12cebc6a25e3. 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/QMLAC1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc154cee691f2484dfc417a809f3f95f13aeb8bb999c5b8d36aff604d6dc3a458. 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/QMLAC1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd10acb0af9291f4a39819f4dc59e0d2c8692d1189871bb25da85f6cd12fbcc. 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/TCAAY1141698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec9d398d07ad7e190160e2ad31cdf2176866f78114282c2aef58b373a09c0b. 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/TCAAY1141713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023e25c553dc9bd8b32b2c03c1f9983a6fa7102037aa3f704425bfc5c0856f4f. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZRAC2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8befe91714fa3ac56156496717c26806220c37544bddfc53b3663f283ccdd6ed. 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/QZRAC2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f19c9323857df8b815ec1b379a547d9e09cd8def5d08bb40d47e3be4303c276. 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/QZRAC2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4020fce4cc6703b816e9d3f61741e95074a3ae8f13f8ced3658a3e823692bc. 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/QZRAC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042da7049aa33fcf275333504b2db6fa36b914b4b2cea17b68994f383a09ef43. 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/QZRAC2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc54e96dae2136f8bb38692982b9dc9e409b61c8292a89eb7437072807b631d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZRAC2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f3a87f13f7e995c934f669b9e616be0f55c217cdc8b1020971c5eb5f17b67. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAFO2151894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870099ca129222f91f03a9827f85628a0a5bc5844e4bc75702ecbb2e37c6f56e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCAEX2075121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb510d675bc59ea1fccf522891618e1d95320cbb7b21aa8ed8dedcb2cf020a. 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/TCADP1866966.