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 0xcfc2c059dad0f33752c03b792b41ccb3c8e0a09918b9427919749c818a4b6c1f. 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/526dfcb3-3161-430e-9ed1-10af5afc1371.json and https://artists.proofprofile.net/proofs/artist/526dfcb3-3161-430e-9ed1-10af5afc1371.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 0xf6b98f360f310f65a106c2493d3f52fce2bff7ae2df65fefe512cf0677048169. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAEG1938603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98590f33560e72b5da3446f2832b06d091819d0b599c6313653e24e72d9707c6. 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/QZHN32004958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e31d5c1bd2adf05fed752c0c55d0b66638ae49894de9d464a5ce3d27a31c6c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWV2076515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c3a9bd08a4e284201978079110cc9a932dd50b8a769633ff2b0f409d14c928. 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/QZHN72189569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52048d263add3990ca35c504de59307c49e6e0ebabc3af21d6543295fe7badb7. 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/QZHN72189575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01c20d111d20f1fedda353f4cf34e5f869b0b4e3252bd9a8851c305f81c2e2e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTAU2207234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144af3ce649d4469818ba13ccf7e75ff990382b4635e06aed6ddc9ece65992fd. 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/US7VG2317277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2055195b1321e496a10e2452f83472a6e81d65af33103907a7d4f917e774095d. 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/QZGLS2355638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640c81929c5043f0dff204fb76b635b97d826f0b2bbc4f7c18b6b4ad1887ddd2. 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/QZGLS2355647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699ce0c652361d66f1b3883d8049e529a290ee5cf6b4bb226a374bdabf839893. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZW9L2389057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8169cf88a40f269163f4290fc23452e4f0ad55e886b438ffc1e043747d7a76. 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/US7VG2425757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850ed0f16c20cd31e2859f451790fa90bed6601b9d1e1be2c5d9beb1b6e024b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2488055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492abdd020ab48b862ed6011aaeaccd02dd35a8c7f8b98bd0e10232aecf1f868. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZGLM2446604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0984e0ebf6571836b7172105ea65d585487b5531852d2e514be9a474994e5f. 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/QZGLM2470933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe055d3f3757a7c4814abc813757021da0396a8af7b9a6b8ff7218911f221244d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZGLS2461331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e15ed9f590edb015638c198016b59274aa3f1fda4cb188dd354ec6fe3c3a73. 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/QZNJV2415600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3159083168aa73da89a651efacac02cab390fd24d57e87f3079a698a82ae3793. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZW9K2429490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5497fc3a376a6cf0ab345a0039da6d963cd2a0a9fd0264be62adb476238ac50. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZW9K2429495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f06f5f505b588f5df7e453f1c7927dc1d0fa3f4edf50ef4ac04605615b009e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZW9K2429486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f0a9ffed3db44cb10410a32b2a4c3992ec676d753c06fb3988d2b5daffb26c. 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/US7VG2531143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aae1ad3090eb86359e492e0b10494d4fb9a94e3abf1954b62a558682e5e20f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2528737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153d756d015995625d7796242e47a5858a1e03c9b085914486c2f9bb862e6721. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZGLS2502449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fbc6dc0c33af65fcb7971641dd9bd4b507ffd1be4aef681599eb439569a086. 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/QZGLS2528907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c2b3e4da454711f1f5c4ddd01cd31c8f8da82a0b475d456ccce393dd66d751. 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/QZGLS2518409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79933ef1dba60ff536a91ad7a93b7edd8288eeffac005450e06c86d064ea0afb. 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/QZNJV2536558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79933ef1dba60ff536a91ad7a93b7edd8288eeffac005450e06c86d064ea0afb. 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/QZNJV2536558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592232f291bd23e3413e26cfd5ef7b3104b4ac9790c512330941fa4a9716aa25. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJV2536560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe722c8f60f08752acc458c237ed213cd7ef17afc84bb7ba77c899c24d1e69ea3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZNJV2536561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03cdf67889788af76a344b2c573510dd10dad6979435f6cadda38b1bddcf70a. 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/QZNJX2525262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5e541e27a8c3faedd03672e22cd692d5cd22d26d6c716d64a0e6c761883003. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJX2525293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7d7c91b3571cbb74afc8bd1f1ce08414fc7fa25392629c33e69ec387fe686. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNJZ2508029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e0db43007158fb15bf2486ad2c6dc53493d7be785c157e4150d751860754cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6YF2200203.