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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7582b326be5091fe4ab1143e5617dbadafaddfa16007f9b9fb0552da07eac4dd. 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/feef3f41-57ae-45ac-b94f-4cf24fcb1304.json and https://artists.proofprofile.net/proofs/artist/feef3f41-57ae-45ac-b94f-4cf24fcb1304.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d812c14e6a44120e9bb41705d3433f652feb2e30252489d1bfd4e4c8d97f88d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2488618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5dc4b28cffbabe8055bb9f25218be7fe4fdf4aa83b83da102d6a0325e3141f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKEX32217079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b56e788069bc8dddb03504047eeb217b14a33f54f167c62f45b44e17ef635d0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UKEX32244514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5c73d5f3419ef02cbb0361d7e5c7fbce9f1498fb045e58466745c17a7f5aa. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKEX32244517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc271b38420cdc727c72ed56f176423e42c89c04d9a362a052ddb6870dcc5174. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKEX32345334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f24870e3a7b998731ca117c258705a4cc56faef8485ac9db1655c56697c441f. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/UKEX32347847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8663a3a214c2990196e48d3b6bfd07690766c0a288668da9c8bd17968af88b2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKEX32423142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe162f30974e4375ff263eea31e4eebcdde93129967b72286c4604850a004ea07. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/UKEX32423143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5579d4d44d830b5fba85c824be4a2181993620b5a9838499a2f61952dd16f5de. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKEX32423144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa527588873b875b9a608385c1f7cf74fb5000f849cfe196c6db1dbab57f0586. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKEX32423146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f181678988560a323188cd90a8676e235ad0ebdd695d5470a2aa599306e5d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/RUA1D2427312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49928c87d6f9e24577bf61095551295073667150ddeba0c5a3b627b1b1f05987. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUA1D2427315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe091e7f339be886a1fed36a12671c89639d07d818107c61df8ddaa57ad98fba7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2402420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe091e7f339be886a1fed36a12671c89639d07d818107c61df8ddaa57ad98fba7. 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/RUAGT2402420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf3d9289d4fe75b2f1a425e391d833b7be568af41e2677e4096a43cb2a0998. 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/RUAGT2419815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a47bfe11558773af832bf8a0e728b66ce2128e5626e7d79e08bde55735671. 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/RUAGT2419816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad25ecd4418a8aca55d03b493139f3146732f49f673b736541ae7e05be77582. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUAGT2419817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cd2a11578292a7f5833b506af00b1a536fc635771439b42dd9eabc221d7205. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/RUAGT2419818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4741b882db6385033f45bd250a35d8fde5ddb7a33391ea5ae5390c04b536fa0. 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/RUAGT2419819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809d764d1689c40e3e2d967d5cb7a066296a8607e162b4ce50c1d582f1abd37f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUAGT2476639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7033f51263a9d54fdb469da107440043a229aafaabc1ba272ade8128a201cf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/RUAGT2476640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cbb637b8d1fc5291adc4b7eb2bb9f512ae9ca518d8a1be9997895844714e54. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/RUAGT2476641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e29de4bb03f35a12fc5c6220704b220a9767f9ab68cdecc96b63e37539fa06. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUAGT2476642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bba31569de97a94018d41be8766cedc79d867a1097b21044343198f1e13f1e1. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/RUAGT2476643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3e32a684cff0ed0b1ab73376e4e9c8751258370c04960ee55fbe326a51a23d. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/RUAGT2488939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9f656f0a0780f9a5aeddf1047ef2a616c05f2049ad7355cefb77c511bfa8a9. 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/RUAH62407525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc49e2ad141d848d0ba20eb63e12047956f92f970b347f7a68a5c2719baa11e7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/RUAH62406939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f4115a1c1fd39dc76dfc73b9b3842ba80889d6398c27a236d8e65e1c47bc9e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RUAH62408118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cd5e925c9fb05b434c4e99b5910eb572e68059cdc031272f3e12e5c77c3225. 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/RUAH62430737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b714cd4bf41205bb73a8ec6a83242031011c54a6e8732bb42f5415d94727520. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/RUAH62430738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76009a15af851dca9cf6bad62e7067c2b7512634254bd70808258c3a4165ef. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/RUAH62430739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf03552b84b2b4268044f43eb1e82965a8b957ea8b09298d9aee61a125f5c960. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/RUAH62430742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def4379c73285c99edaae278e26d0cc41d30b4dbc3abfadf6e66a7329fa25ff. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/RUAH62430744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9c212ca300416fa7786dff132fecac37c4ce19d891a167523e01d1efdaa45. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/RUAH62430745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1632fdea559c4d273f50d50089ff2c9105886ab01e5fd1520978868e93ba62dd. 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/RUAH62430747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5128248335e6b4b66d65a7c3073bcff996dcae073eba96eebe4bb1cbc9c8c7d4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUA1D2530792.