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 0x33efc6bd0b4c526bcae32c70c92a03e4dfdae585d966ec1070078adeb166a3cb. 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/50554498-2691-45cf-9cf3-20606f21e174.json and https://artists.proofprofile.net/proofs/artist/50554498-2691-45cf-9cf3-20606f21e174.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 0x5e4c235c82a1060a94da93b5394b98300abe02e77a8796312c2a1ac741e7271c. 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/QZW9L2364234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99564ae01a84bd921cbc44978d10c847b69360bc56d86edfd8f68be552e18a6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZW9L2387281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f90bd8879bcb5ab115de73ac470a78f1ff7e1de1e950eb52a034bfafb2b3bf. 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/QZGLS2467764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09cdf290864a620933b3dc9c77e6bafbd5fa8b054d64d46452864df0e2d86eb. 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/QZW9K2456210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e615acb050ee9c87c5f51c7745a3fd008afce45a659ba305f457dc52c385161. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/QZW9K2456217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8708296fa38cfc1bbb35eae0a22548ab0070d04e7923d26cf50d485509beef. 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/US7VG2540166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02144b8b7fbfc8509a0a8135f8da58152995aa803d6c3be54bdbf84ac71a1b65. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/US7VG2540167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecdacf67db68eae78458cdd0bc58265b0773887db5090fef2719f44f9c11c68. 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/US7VG2540168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b530c9d73720a34ef56cbb984467b334ef1aea34b11453261d2b14d7c0f18. 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/US7VG2540173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793b2b0e9c7485f40a9af2a443cc28d23c3f94d65d178e78b962d6fa3534c6ae. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZGLM2594321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a011010e8c08700d3bef3ed25837fcf2ef82efbd99f762d681bf3f581d3e90c. 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/QZGLM2594322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ec45783e355644b5bc89d939e41b93472e1cf591c19251e9d409fd0a2edfa. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZGLM2594324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1b18bd442547f140f36f1835c8706d3e86691bc5aee5b404a652c065e3a85d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGLM2594325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee87840cd6184c86a8ac50651e6447f1fb0ff87444ffffdb4d75e233e4f5690. 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/QZGLM2594326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446580b2249c5b4968a08d05459dea7fded7e22fb0ad0aa8f9142af416066969. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZGLM2594327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5fc690a30099cc0b70d899a00efe7352d82c75c13135b0097ca118dd652200. 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/QZMZ92538520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3422e0f2f943700632b386778765a846c496d9fea1b9977f50cf0095a9496265. 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/QZMZ92538521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628ab16928642fb60f31d0c4126b2b1342130fdec79cda20d4372b4bd7c55ac7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZMZ92538523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6bc773a9c2d109cc48211cdecd33388feaeeee79acf7196f8a5cacda40a757. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZMZ92538524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5484e5d8c17c0b461c920083649b97560df430deefa9bfe11e3ef28fffc58906. 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/QZMZ92538525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3a628a7d4d3e94f6a9b688abf24c0578977c7cfd7fbe3bf0f099ca59e337f3. 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/QZMZ92538526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225ea7ff2c7cc0b32ea9a457e79df7ca9803ac800bd779c02d308f1f7ea416cd. 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/QZNJY2567153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3789848881bdfae1f98d797cd1de7f18bada8f19c79fb981d47f9066b57916. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNJZ2534477.