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 0xa35328947b4197f4a15f85e11109badb06f4a6938c2f5575809c216f7a830770. 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/4616e790-f09b-461d-9909-2f87445790f3.json and https://artists.proofprofile.net/proofs/artist/4616e790-f09b-461d-9909-2f87445790f3.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 0x229b965a538ec6e098202b829264ef1cc9ed760076140b5122946c15a95ed56f. 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/QZES62355028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4234585d52dd2d4e872c8db6017b4142d632639bc0ed73381ad3fe34a2c193f. 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/QZES62351538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf56a1fff575f98388c3767ef1f9c989710ad8ab35a96403a86d064c99bcdfac. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES62370976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84c17f57c281249dc60d4fbfd0e51a7f97df3e17824e7f4c57630c1b6945ff. 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/QZES62370983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e5f95be061c8eb1f31be3518f32226c495355e7ef16ae06209104aa00c37c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZES92309140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bc8f1e359e0cc4d11f43a07a7287e12a95d781bf3471af4568a546c4ae2af5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZES92309143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bcbe5095c67732c301278ae68f9447df2787c88b31f8945ff1bd06d3e4ea87. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES92310894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e193041180e7a8cb2867eac36a3110ce499379afdefa2361ba8e2ad3af7a6f2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92310896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3318b10b954757e795ff766e0721d66bf07ffb3564ce95548f6e26bd117fba. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES92310898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d287021ceeb427aaca05cc83ebb42ce0e6abd741f8e9f3f479fe96475cfe2fd. 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/QZES92309151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3afc713c80afeba0b5c1f33daaef59cd04d6bf05c35f25a3ee361a8ac75c22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES92309153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a83574f89db32d64edab309d34b97d10a6c8779980f97428ba9b6c04fef150. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZES92309154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0729e36083f7c3b8a8b678d140347360a6e627de16205a2c2c18bf088ff75a1. 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/QZES92309155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41677a4ce973d8c62d8bcf5796067439b2870b39a8e13d15d0b99dd611279ef8. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES62343697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996ddb7d53e72242809832bc8b87d453fda17096f61fdf160f14b8d8eafc6ac1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES92307165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0070a205d62c81ba8e95d90a73b1501f43f0bb43ed184f783b76831116825a88. 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/QZES92310910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc571383f78d99712f96a871bec73d9e099aaa2c8abb84f792e758b2055cc3a. 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/QZES92310912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0252bf120b525c1b42a545d2df614ab3d0d9b6d235ed5495944dfe564b74fe. 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/QZES92307183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0dc3b6fa8024c04ad26e70b2a9f22183ffa98a2cd01c7cbedd28d8d0c563aa. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZES92307193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5011d92d0bd87f27da8f36aa8c05cfeab3425fcf37c7e001909db14df3271411. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES92374870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cffbd8d36b7104bac174bedb3f35856b59e37c7bedba0a46f842e342e581ff. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHN42348403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd052506a5f7aee5aa028beac87087b0855fd01759a1b25dc8fda621cdad56344. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN42348404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fafccd628076ee3eb637d9ce82893e119bb258bcc4f53f3300e62cb96c950c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN42349966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b96d421d2cc9542bb5458086d8b88b99d6966e5cb051b9420f151b8ca4c5d9. 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/QZHN42349969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833c5a709d87667f85c5fddaaac40bfb3aba5820370b5d5cc7f55a6102aa73d8. 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/QZHN42349970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a974953557b763fd61b30cf38b1d08db7a2d11b3a02d5f63bf60cba983e2c4a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZHN42348413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a71ca1c1781a51ca5068ce903a3f0a8fc85ed999e42f656e4e3565a9ec0819. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN42350030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f962e2dfcd8cc3bc7107bb710e97e3942542dce51819f254488fafe029c3f2f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN42350031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1578403e64ab9a731b098a44a8eb380b53c8819212d6f4edad674f2a8ece1f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJW2498811.