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 0x220bedf9951f4717e6e502c9f833957e288e0b86f9dd2dbd320575b5046bbb9d. 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/f2302155-e117-4f8a-bbc3-aadc5e345318.json and https://artists.proofprofile.net/proofs/artist/f2302155-e117-4f8a-bbc3-aadc5e345318.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 0x05a362cfabdb26ecfb68cec3f03e9eb928d4d1ca04976a0aa61b18fa0d172d13. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:29:42Z), 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/SE6TI2038549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a362cfabdb26ecfb68cec3f03e9eb928d4d1ca04976a0aa61b18fa0d172d13. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:27Z), 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/SE6TI2038549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4b9098aad06cf17c0fb9d94442826105d41cd656c2e827e8e79a48b3ac7e96. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE6QE2064268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266fad5190f652562e28fd890a39daa6e62e4dca5d2d4fab0c94afd4a8b60107. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/SE6QE2061743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069743c220f91d4bf041967f91692bc5125f85caad5d78f6c84a731f65bb74e. 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/SE6A92197251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ca424625b12c5356fa264fe52087063a7b9ade16987577523ac9d8109b5e7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNC2185479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d2021f6a95fa9f5bc5ffe901d0f7a5d8647c02b504a1d5e94fc9dc594ccaa7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZHNC2185486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ae49e7907358fa267c37723dd644ef628a297dbdb98ff4d62f5604ffa1877c. 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/QZHNC2185487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028e653db51738b11b7bf0096820bb5341139358a76de61abdd016e995c4a70f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:18Z), 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/QZNWX2144422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f20bede3cbfc49f6bf39eddb5574f28aee970145cad74e10f98b4851e9f570. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2132271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb48bb8befcafe4ed49ebe991a036f6542dc6d46cbab97010a0f2f1cc7be97e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2132272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8bd940ce1a67ad63704c172714df0a99ce9f468197e37363d2ccd8c1a9cb43. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZNWX2132277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d1daa25b177ca2b8eb4f1c41bcc27e3ba6997299ee959275b01d8d33323f77. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA42274422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ace884080f25d62b7eea25db9de34a5a84e34b919a28b689115bf6b136d5a0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA72220124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1601a10a6e163cf2d3321cea19340db4ba36631090755687fefea2299cd60940. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN72285293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a8e07fe3a0cea0cbf648c36944677033a23d4734120a20313d99a00b13f42. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZK6H2265487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2b527bdbe4ca9a390c066fd26d8c98aaa39b8c38718510d5ab8794d5b517d. 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/QZK6H2265490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016faa7fc1310e4d8aa6dcfff49a097833d88e133eef3ffd16de4178b5add291. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES72398936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dae7cd3abc53e0c0b824d8caf5e598e1efcbb6e32d57ff4c26d05e79bc0b89. 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/QZES72398940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0372c543a1dd2c7ef5d2972b607ee93d8dc9a9135251343b6282e084a88bb203. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNWZ2341352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4f569933a37dafca13696c0f620686c78c44861eb77750dbd1ad545ef076a. 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/QZNWZ2341354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51a6554d57ad33cf6b53901cf74cf3585c223d8df9845909a6ac87c41c1589c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWZ2341355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab0aa6e336e7ef9a48891860ec089756a5af1a724d0b00a6d55b1ba61e859db. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:45:16Z), 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/QZNWZ2341356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952cdb5f200069cfd98c998908fc2cbf9c50d1b695c2eb7ca690db4d71f2675. 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/QZNWZ2341358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41957eadd3aa2a23760c22e5db0e4c523e0bb4725221daa6bf9955b9066eee83. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ772459842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381d97e6223f03fe55a4ebd29c010aea4112b83349f4a0c6665229160375e2a7. 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/QZZ772459843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a14f665e5c9b07d10bcee9b4e739bb7b78d9d53d695bbe1e3a60d77ce8f430. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ772459844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c511321bce9bdb8b4a2e0fbaeb3f083a025b77ddffc95e34a812a64bd0e81b0. 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/ZA52S2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d366df3709b92ee8d578e50e471fdcb4e2f666a52d5dc1c896a40b398bf558. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA52S2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8637896b93cd7c387ef96407214a271ec70201b820d4fb6f5bb5005b763e646e. 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/QZZ772459839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf906d99b5ea79612c3b92298e9bac0221ea4d1e27f46b3f918bf289d79c12527. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ZA52S2200056.
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 0xb76aeb265ca301fa823ebcd15c0d2db063bc09d27f9de83e339ff320b832cc5b. 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/SE6QE2061745.