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 0x4c90e5165ac76aa8fa2631147a3625bb625e642bc4a4cb1bc79fab73ddc514b7. 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/2314ef42-c977-4119-a496-b79481f8ceea.json and https://artists.proofprofile.net/proofs/artist/2314ef42-c977-4119-a496-b79481f8ceea.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 0xcdbc0428e04ec7b594ca0a57d9c33d667a7259ec825c095fe1c427ecc558b55c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU2113035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8be7aef878efd189f349a44aca0a7d2ff26eab08a281328ee538aa30e95b18. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE5BU2113037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd69eb654e2bc24cac89107096ce2f78491e0e672990d9a693e592ca15aa79. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE5BU2113038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14ab93738d7deaa6d6970bae56b4de72e99a4e03c332a0f90ab54c1f93e742. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE5BU2113039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86cf2be7e93c6c18158d003da3a4a22d0b1f1901d305261f3688fe503ba229d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5BU2113040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3d6e5b41819fb920381b31144b2c57cef18a5f98703f354827b2c0278c244e. 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/SE5BU2112948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d69bfb29c062fc8f19a04f7ec6a41a5150a44e7459077bdf4a0fbac4c16cf7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5BU2112949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b849ef71e864c749ea62437bb709c1999e60418c09d9f2f47b1e52d901169e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5BU2112950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660968abecc05e8cfcf6c6498c9da72dcffe8362b58196faebd9cc7bc43769a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:14Z), 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/SE5BU2112951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637ac3c951e999c647e1c03e73eede06cf9531d97f919c4ca0209207ca7665d8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:22Z), 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/SE5BU2112984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771820276a2b4099cdda1ea1f7c9284064465c66b25fdf8b87199d9999abcf57. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/SE5BU2112985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb3ff0d467b04c4ee5ce397ad77f5c1fa62a1401280329210bdea578553a7f8. 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/SE5BU2112986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b410e1a7803b79fd5507bcec71c0e8accf940c7ca438d89ad8f8957bc20601. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5BU2112987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10498c1feffeb696858df28eb0f703da050fdd89cf1a4429b7df6cfa78f39f3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:56Z), 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/SE5BU2112898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1e97cbbd01a676b8408359b672e8cecf3b13c5eb9d6ecfb67a3d496f37bd7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5BU2112899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc2f23648087330dbde14a0476b20c57dc79abd19bfc8180e3ffbb3aae0236. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5BU2112900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b905f14bf7c47e28488df6487bf95743e56706a6e67ccce1fd4f8caade77ff. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:55Z), 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/SE5BU2112904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cda0d514794162a45ab6b4a3633378eb598aa8999c6092819f88e8e9e782b34. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZK6N2515318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76753a03b2476e284aba83505ffebf9fde7ae1b1cc80db539b1411ea66e7b8cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6N2515319.