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 0x93cf7e626f70976503cc7d7d43641fada5eafdd6c6d5ddde1eaeb9b452dd486b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/950458d9-7d03-4007-8a1e-da45be641f11.json and https://artists.proofprofile.net/proofs/artist/950458d9-7d03-4007-8a1e-da45be641f11.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 0x9117fa8c6d224c366adf05ee6fcf83ccc50601e8a77c768a0331495a56eb4f90. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFN2337580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa36951a78b5dac7cbce65c909c30d3791ef55b8e65790c0e98446bd820a620. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFN2337581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe987cf39478e15d7a9248b2503ddbc5b5379b3556df8975e1e21e0d28d0b84. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:14Z), 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/QZWFN2337582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3f30674ed5651a065efac57ace4228dad2275f3701d19ec580e3fbc623fec1. 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/QZWFN2337583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9389c93ffaf9cb002fbfcb5e69abcfd3d06d13b6f7e89818b0e7a9c5c90b88f6. 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/QZWFN2337584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77669567b0cc426e819a8f3a5f7adc10b34385bcee066a6e6cf58105195652d2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFN2337585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb102c20aeaebf247ee650c17fa3f577b3d76c8963c20da082db40aa48c2242a3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:47:03Z), 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/QZWFN2337586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83407d834dd791b0b1bc1ff40804b77aec6d3b1dae56e078a822237659fa4973. 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/QZWFN2337587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d146e90375ab5cb3dda4c91f660e8c54da6c4a98c09b7e1182b24c40f2766e. 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/QZWFN2396458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa682005dc25924217b376f9031273334d3de61b8683c0795b3359a87bc1fde. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:55:03Z), 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/QZWFN2396460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd13ba6f47286bfc8d53d0fd8374386158d2aabaebdf7c465f53619e97502c1. 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/QZWFN2396461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973cb691342d9f75f57110c8e88564228e2498d7d450efa53a04bb28a41488bd. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:29:26Z), 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/QZWFN2396462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f9c9d5ebb72a8e367a1181b0a0791577d917f8c6bc07e945ffee7bd98980ce. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:38Z), 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/QZWFN2396464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50be5f67ebe3c40bcb08aeba4a8dddf1a8339a53f2b16eb6aae2f521f8e3f317. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFN2396466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a6a34a30d88ce344cddb9e120bf35c9494c79885d1980c470a11963b8b95a0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:41:22Z), 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/QZWFN2393480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf1aee1e94bec706506c2733e67bfaaa0871fce3a84cb1bb16c88d535de2cf. 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/QZWFN2393481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d999d8fc5cd35bde3eb84aecf6f5637dd930eadf598d509cdb47b7b6e93865. 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/QZWFN2393484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59819fdcb25de32e4a6746a98b84556b9d958fe12aa27d9f3a2e5672462cf5d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:49:56Z), 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/QZWFN2393487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dd555e523d9ab3428afed97c0a5acc5ec004e1f10315124822971a2a9398dc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWFN2393488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c664c220d9ff575adf43a11b4721921d26b5d092b2b1eb843b508b2d6b82fc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:02:13Z), 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/QZWFN2397123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2cc8d7e8e274a618313f69f4cf002dc5f19f11e9a968b23902423cdd98146. 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/QZWFN2397124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264dca42ff0b22fcc440a5f32aadd0bd712c38d6cc43b33da6e815089547abba. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZWFN2397125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0edfea851ea905ce29cb9a9782956d1605228d5b2ebed3450fa4f7159037588. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFN2397130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dd21eb007ed8ee6e4f28bb149a4b39cb1fc4daad64d4d695113302449a3c66. 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/QZWFN2397136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1873fb1d96c68f8c53cdc64114740fe73cf54fd1936ea88e38a78e4d4de0194. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFYZ2444889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe762417169968f1f884bda314b79f4d6e4660d61300e9b947da34363160da. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFYZ2452286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0466298e20cd36cc3afe81d2610f44b2acfee4d8cdc258cc7163a2d5d2b96940. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:34Z), 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/QZFZ22496100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c257fcc3c0e4fdef986378c5e65f706d91e0c83f4a178629ed176cb7f14d8d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN32452546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bec0d9e4bbf3a4a39c43404f19ee5b7b420ec382bd05b0037be96a9bcf7130. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN32452548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a8e6e32d54915e8859b3b2ea0a5283f8ac78d9e39d788f0bcc142df0dafb0. 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/QZNWQ2414311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff746d1df3bf59bdba6e34e199dcb753fc349cb7e9895a5dcf5a8145f70877f6. 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/QZNWQ2414312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaaa95dc52fb4db26f69203afd66457f230809ed970d38751f9f5f686ca4444. 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/QZNWQ2414313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863bea1c1b3c0a7d353fcb33280bea9e1da609d41a32a33a8be0ab2054f2ab5e. 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/QZNWQ2414314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad54902ed25b8a17d12047392547bd2d662de61d61b6626569b472f63ee9f34. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWQ2414315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddda241f38ff2e22694b056bb4a52f832143a545531692ac4ca109f5c1e0852. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZNWQ2414316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e6183e80329aa90e0c8a2426812e3261326db9f9b7bc00e38ed9ff1570d9d4. 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/QZNWQ2414317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee2d138f6be67921076df9ae97065e1bf23502421f66d49ccb912e2f5b5d78e. 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/QZNWQ2414318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aee81e7ddd0136a968525ea72fd0aaad0bcabb54ba061fbc198db8bb275006. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:59Z), 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/QZNWQ2414320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd89b0df03c3b293032fa4cc0283a148c1bee1f43bdca53d72e5f16a2ce1536. 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/QZNWV2444504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd451ee7c48ca8459f0960fa0117061b7c796156bfd51f431b4549ae4cc12aed4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:05:23Z), 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/QZNWV2444511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a77c83358c72123dde00dc66ba463f58137beabf93a9ece0130a89e35f0956a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWV2444512.