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 0x28d9052baedae78da9862a86632a65bf01144060ac35507f0be0f13a3402c42b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a0b812a-f8be-4204-a2f5-3516d13d9a68.json and https://artists.proofprofile.net/proofs/artist/6a0b812a-f8be-4204-a2f5-3516d13d9a68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8343f62ff1b2f6697b208f1b9539e2e26773cbde8233585edf7c669d76c1517f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEVLI0813801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4eb1dd2795a14d926c2cbdab7dcd5fe3ab59dface5c6e32cb5183fdb99be19. 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/SEVLI0813802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8656a4b6ede581f39f4453d787fb5eab0a878440fe84594dd0ba8158fbcfbf67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVLI0813803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0dbdd8fae0edea80b2116c621660e0199ff86f5462342320edf6133236b6bb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEVLI0813805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67908c2b5bc666685dbded408b1a44b00cba525ad15766d9adf89e059ee65481. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEVLI0813807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389e637f38785d5ce36adb4d65da27e1185d217def4a180cba7a8ae0b01a90c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEVLI0813811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5252ad4c5a4fea830f8b965db7b216ed1fc9ecc086c6380ba22133ca5454fef6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEVLI0813813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78fdff53efc2ca095c62bc29f17b1d47e18b8338dfa9872a230b4dd6d20fe35. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEVLI0813804.
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 0x98b8a49e6dd5cc1027ba8af38a8ce4264f806d0ab778d13c38a9dd11f50d1fd8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEVLI0813806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178b7c89ad380768048f0fbdef068fb7625680485f1d233c190b34c76cdc030e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEVLI0813808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc585bf1f6992ad74908f31f8eec5a64cd4d63f3749310299c3dbec7beec5e9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEVLI0813809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb0fd9ab5cbb09ced07f180895bcffab9a254c19e109cbec9b5969c69cb81fd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEVLI0813810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753554f0301b2864c234c5260c6c4c9e3f3759218ec0393873a81a73cd1d52cd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEVLI0813812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48035733f244d126ea2a97f5435ed7d634a1327a60eb32fbe7a0a244da7979a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4R2153516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71130b85b8df43612f881a704499559bdad08a3a261b72e90687879268584582. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4R2153517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3490f3ca0f1ebac01f1ab6b80c0767b306a4bc0593c0eb47ef3d6487fd0ce15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4R2153519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92910eb281e097df3d6bb815e213d722e2b95e30454324d97a38665c983ecd3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4R2153520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d565bc828d63b6d9a49e4a4d5e39e4e1989a3bfdfc21823d7203d20627eda8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4R2153521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c9a3d8c8b9d8b625492f337cb99fad15d1922e9c20fb58b11185eb232220ae. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USL4R2153530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b50be0d621677dc9d9aa9d5586b5f949372726f1f7d5cbd0c6b02a4f4f441ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4R2153532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada75b9be3345aa0d76afab4622fd9ced7902c9c5982f02ca658eab8c0849f12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY42185090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b41efb088fad599dd30abec2ab8c7c8930d4f79a5e051b8673984381d7ba4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDY42185093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4799b8dd50f381e68d5c2acc6eff6bfce31e3cf9dd63009965e20346b0fec50. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USDY42185094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8424801379626da8c515609fb4ae19b51a368a587e1b194825034e2d41085729. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY42185095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0e702346050660b3a0af74b958c06bb6daf5001b2e7f04ef0a3feb6a5a19a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ1867187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc8a6a5a967488effa106827e2ad826abbfc3f246fddb893ea11c653306f21e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6MZ1867189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19591cacd92b1f86618d38a43855c1811408c58e9f4543b0bd40a37242a22ba5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ1867190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980dbfc0bea5d51cdf35fabbfc7a07bf558039912caf0e587b19d26f29f4b83b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ1867192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dbc91ce71a8a7c3ef6e8c0a450f37482699f8ea91ae64d8117c70332a03e3a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6MZ1867195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde9cfa34347843ec2c18558c45c5be2acd2a19af43f4529ca61820c7606b959. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6MZ1867196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff88ad3bb4d5ad30550d379ea2cd6fabed61a3bab0eeced7056807e7b206f6b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6MZ1867193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6463e3f7ec84659bb6e3022e58790079f22cda10e9b8f966ce8d5fe69b8fe7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ91533811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8283da3e4355e471553eb5ac3d96ef276edbbb12ff6943a42a671759ec6d6c92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ91533818.