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 0x12f5002051510644b6e721684471beb603d814c27c70ea9aebafaebffa90cf8f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57584657-278d-474d-be51-7823152b0c8f.json and https://artists.proofprofile.net/proofs/artist/57584657-278d-474d-be51-7823152b0c8f.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 0xe9477676c435ef06811f0020190f31108f7ee3bfa380e65e3d1cb7e29379b684. 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/QZEAJ1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937aa38c0c474f4c673301ed2e3fac841211df68d5c899830b065eafa4cbdd03. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:34:03Z), 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/NLRD51952539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa257794a9f407e5e305d744735c82120f234800e735f08fc3df2ad448951a765. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:57Z), 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/QZFZ52164248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31720a04d22ae608c9b180a094232ff65d2519b3ec9daea77908dbb48495c2b7. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/ZZOPM2117867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca82c1dceb21b9040ed0bedf89dde357d4cbba522aedac159be7540847f3917. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZAKB2166197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04cb86063c5d2bfe350221b5f60a96501b1f878e978a2715080b5065c3ad3de. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZAKB2168185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757848fc28b0e0fed0176fc93f2a63b7a35c11a0cc9edf2dc3bb83be732c33a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZAKB2168188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa112987d18f4fe0c8ab76ea41065bbb43a7a233854c746d71e7e81860e57b8bd. 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/QZAKB2337618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d321abce34d10ccf665ca46504ce5e3302b3f3e567c315cfb768acf2c1ca83. 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/QZLL92414661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa112987d18f4fe0c8ab76ea41065bbb43a7a233854c746d71e7e81860e57b8bd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKB2337618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ef751d39cd902bee0b3da6153f04b44ce3ab8dafaa7b0fdf93adee540e924b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZLL92414663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4202f1966e988f8c326387d3a2ce6c7393da0fe25b9dae4a75b9bb019fb709. 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/QZLL92414665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60089e8982c88a4cbfcf6df02fab8c7491a431c57af7d207d10fefbb550ebc1. 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/QZAKB2129568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fc7a6d791ab1a5dbebf8c64bec9a195017e13f151422947061de6bda148296. 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/QZMEV2418878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f02c5e66ef75486a313c4180c60a11f5a9c4858cbbe919080b74e9c234111c. 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/QZTL92401186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3daab3ebb1d8f27274d00bbe21b5297b9612dd10dea1ffe2d37a45c5ef44590. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTL92425248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d1944fde36c4806e7e7a7cfa3939f934b0e5bf3dbf167664bb318f2030acf. 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/QZS7J2431258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9a2578460f392ddbd8aab0e0f8800d1cf969eb44fc220c59b0b6653c2b270c. 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/QZQAY2534486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d8eb18bc8637528ebf86f1120ccf9449017ef797a33ea550ac639240c6217. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZQAY2590790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3daab3ebb1d8f27274d00bbe21b5297b9612dd10dea1ffe2d37a45c5ef44590. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTL92425248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d8eb18bc8637528ebf86f1120ccf9449017ef797a33ea550ac639240c6217. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZQAY2590790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33489c874b11c52e22b04e83681d3c8045688ec3d1b39811dd4043908f901e0a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZQAY2435640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445fb49b181679593e6802c829999b5399a824911c0a498a363af0aa1608ecce. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZS7J2597990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09861943744ff3cdfccabe3c34e3a50f5fe6e5c367d0e37db4bd855bf834857b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZQAY2599838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcf04255dfe8903446a1360b8fdf255287f603d448148a07ee2d3f185ccaf5c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS7J2583214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e86285216384ff7024b04aad772a11e4e1df3f0332210c539d5774363e36b4. 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/QM24S2308285.