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 0x7186dcb228d4e38d0bd447916771c0411e765b0f0143c7be0d5437584d1f1014. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb4baedf-934f-44a0-a38d-6807f4fff37f.json and https://artists.proofprofile.net/proofs/artist/cb4baedf-934f-44a0-a38d-6807f4fff37f.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 0x82628e69feea9ed7aedef5e75166b9cde8bf4a38fdd7a34ac7d882f6004affec. 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/TCJPH2535043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf8faf118e455e2121518b38c5982d4d58ddd7185211c7304a1b121fc495057. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPB952202612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f51c0206d29586aca517862c42d9391599927f86648a3f46cc3d07a9f4c40. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/JPB952202613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9419196806368c16d286a9245d209cce4c3f9abbcea70b900f8c845f32abd85d. 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/JPB952202614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57117d99955ae1037181e08c26b77429c87c5294b586f32c4a8227a7cb548955. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPB952202615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1159411008784f90e46df1802fc7cbe07b2131ce8bb7b4cb338ddedcf4283768. 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/JPB952202616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2e1b31465b6f84467bcd36821083c0b1a3fd06736510f391cb23104d7e2543. 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/JPB952202618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cad5091b0dd67cb3777a7c94ce09165efc0a180cb9880431e561468f38b896. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:52Z), 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/JPB952202619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c644753c2a4386d2faeda42a4ae37a77c2b0ba9ed49e2aa52443ab28ffdd5e5. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/JPB952202620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbceb777a2135548ae45f27ffb92ae293f1671849c722125fd373bc6ff6e607. 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/JPB952202621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45015c232fd2be5ca5bfd8b42b3d7ff61c85b446fdef8ab251fb8a1ff1369516. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:48Z), 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/JPB952202622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d030f5f09f1edd539629c3e7aa0e46107168bdb9391bad6ac14668a68e5cdb5. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:55Z), 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/TCJPV2397811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a63246490804ae3ab40cf12283e409c0406f8688876aa2f6b939da5c748ee2. 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/TCJPZ2494090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8492f05dc64525417b4d0dfe039891121b44acaa653bce1519e97760341a1f. 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/TCJPZ2494112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a42587c0e34a38272c8f66b55bdabb5f375f9d3e5f005717f0a29f5bc74d649. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPZ2494121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451977257ad9233b4c01a37707de1d3d7d1fa2db0a4437b1566dffb02254b9e3. 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/TCJPZ2494133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85db80af48c57982de02f5d0a0d958f12942b99cf14ba89001f34fd92c136fb7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPZ2494142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74692cf1d1595d972b28c83d8443cfb9edcaa4c288057ad69ea33c1022f18a9. 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/TCJPZ2494148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dac19e753f446905f70e3199005089a4b547864ec5073c2784725b0c2b07400. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:35Z), 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/TCJPZ2494159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f9c752139516e52eb4314312b372aaf9ab4ddd91c3a9cec87b8913e133247e. 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/TCJPZ2494191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421558bebc82942ccf2bfae4f4dc1fdcc8693a67885d1f24045ad842174d532f. 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/TCJPZ2494205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aa1b28469edfb1b77c0bdbeb729145a3cd2fa1f634cd9e5bfb77aa8c5407d0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCJPZ2494222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57fa90d7dd93330c1415a24cbaba8d0dc74f99ad40aa88b0fb12c78c51b70c3. 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/TCJPZ2494251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff94362b2d40b0dc83c2115dbbbb05ba0ee287d7a4452afc76ee83bfdeba63f. 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/TCJPZ2494268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f09998153c46e5b501ded66562c2ca79201ae4e993ad8cde2017c7ca675f274. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPZ2494287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5465c7ec6c0ffb07bd51a36a066cac9b82d64f580a1b2ecb81d75c5624b1bd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPJ2523818.