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 0x66b55ea038f55d3252fc8113d7392d10e03cfa203440ba4a37a0f966f5e521b2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d266bcea-b79b-4253-9f3c-691d82fd6d36.json and https://artists.proofprofile.net/proofs/artist/d266bcea-b79b-4253-9f3c-691d82fd6d36.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 0x5f2c1f7e4ebd1cf90aaf78c7700051a0bbaef8cf63a1f6d6b060a98038b58e49. 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/QZTAS2251664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17b0e8a0dad8c82c5008b7e396ec3e48dd2481ecd803bbed3cdd3ee4f3fbfbf. 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/QZTAS2251665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cfa716836fdb899b6c2547623fa6a37fcc43719b24667235ef5d754a3e9827. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZTAS2251667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805de6e289ff0a630072bd23b23d35ed614fb5e068e855ea9bfda19777c39ae1. 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/QZTAS2251668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00b5dc6c7db301684785ed32c9391d09132d75cd759124e30131256f6aa0e94. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAS2251669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1bb9bb6d3a85d1de4352616b7ec4abf326b2d8e481feb31f2fefdb42ddead. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAS2251670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5306239efbb6ac08bfa9c533c64fc67ccd7b44bd6480ea0a1e96ef3891e5094a. 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/QZTAS2251671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ab8aaa04260b04e3774e09a018172c171a5e281de4971edfda0d2633c20a7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:00Z), 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/QZTAS2251673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c808ce45ace33d387420819c390b2ea9731620020ee4740abb5af4b84a7af0c. 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/QZTAS2251674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c7ff2b0908a4a6cf022ff99bc6793574c1e46c73062b69dc024030dbf726c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB52213375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c805a113fe91daccfaf6f3ae3cf6d15439a3a5f71c6dabf7b490941f0cf01a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB52213376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a446c6c52a5da9eeb8426bb674e2e7f440783fb9d69c4ec772284128d24d9. 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/QZTB52213378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d2af88f88fb6189fa1e6af66164151eb96dde9e781062a38bf28abb2bd6873. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB52213379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c87ff335344c3136a24e954b08e67ca9a8c836c18970771de9ca2239616cb59. 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/QZTB52213380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d025ca451990c76f8133959d5acf1a80f63d7a97bda9a4edf3df3395945066. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB52213381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d735a1c0d4174e97a54c97e3b1522b948c3098e9b6dad60ee313c3f654b47a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:21:49Z), 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/QZTB52213382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb672152c24b55dcde54a2bf00d4a6c63b2dd3569bc90ccdca0cf495beb2d67f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB52213384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52df35427f9741e72951ba7eb290663a51fb4a3d641ec21f3124d9316ba8ffd1. 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/QZTB52213385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f391d1ad6cd0fe002989ce8a1def6b30c78469092a244728aa15d5f163fd25a. 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/QZTB52213386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c9efcfababd36eac4ecb0016f9195ebbcb9bc142da61c965ee40dca26aa3d7. 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/QZTB52213388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925550c150ae3548e5138b532198d0e8386c9ac40c594d592a275a384335fd35. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTB52213389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3669b1b666e2c04b5ce859c64677bc7cb6e2b54feec28f04576d8c722fa17e3. 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/QZTB52213391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c758bfcc1a264387569581a645c42df7f4a17f43254b94f7fcd6f892c6ac2e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB52213392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb275e0859c2d7804db55e3e33295eaf1b593338b5782618093f7738ed5e81ea7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB52213393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c135014ae05cdfb2c5fc84319eee717883a6c355db5c3ef95a26b40a15f95. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZTB52213394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d2f4e2d671f53cf06f70b30b772440764fae22b4b27e85d1f4a37df6d901a1. 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/QZTB52213395.