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 0xb68defc269975db794c0e23f54b5bfd3a6a4c60c53928bd7c9eacf293760e5ea. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0982ca2c-b1d5-4b45-9dcf-5ef5e6c173a5.json and https://artists.proofprofile.net/proofs/artist/0982ca2c-b1d5-4b45-9dcf-5ef5e6c173a5.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 0x021179577e3fa0976c65dce1028cce4d1e80659d183b2f4ce4fa81a6568624c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGZ2308987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba15a411bb920d800f1d3d753071a1ee59b463dd0aaf2457c648c4d98c06cf4. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCAGZ2308990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a806d8c57c2c5116b83cb4b2bd6f84439f64d733f11c161badb9cea401984. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGZ2309059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86349561f961e3a32dc8e7c8dfdd8d83509c39074012f2cb178c8b74f9ca4896. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCAGZ2309062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eadbf64b785b96ecb02b572853b044b7b69bd5cb369e0b67955980458e9c618. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGZ2309069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd7101798168fdc93f274d49b08db09fefeade0025ec4a07f7a7ffc65ab88c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGZ2309097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4122523a307a66a5b427427cf4f512c4ca7586be8746b8b9c69fbb7dd80f0278. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIG2442563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183d0393327babac001b32fec7045c1698271b60f66dc04ecf5248f11ef3e72. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIF2442573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a8ab6d76fbeed2d0d7bc3a26e7acbd8b1aff50cdb4cbb1b1b47b4261d98bb1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIG2442605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5e176bdbe8d456beff90f034c4cec49a6b33fb59d16b0fb5a3f416c9ce2a95. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIG2442625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80023b25c8a967fd8d2cd407e8f20f9435e9a27c14f2b485dc4766608453193. 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/TCAIF2442637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0198d7acbb779c981889632fd3ecdc1572ca1673180b18b24bbd60393292f75. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJK2588018.