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 0x3e6b101566c07dbc5f9e0035e938ae1c38988709dc5b70cb7548107ee3e462af. 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/0dfca2ba-5e54-4803-a674-befe0007907b.json and https://artists.proofprofile.net/proofs/artist/0dfca2ba-5e54-4803-a674-befe0007907b.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 0xa94e185f18aa8b4a622e84d44f6c9b90f43aa02eda70fafec6ea24d99dec0ae3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:49:27Z), 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/QZAPG1744090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f779f067df444b89dd6a9fe5719ede05f447ea3cfc2a9e3e10b2b30b0882d2d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZAPG1746961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bbb09023023d2dc5b43484f42b3e4c400ac04633afd60cf53fc38a9fce85ff. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZAPG1746962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20e121f964bb0c1bdf28f5597834196b44b10f753015a6b4ffa190316ff8bda. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:08Z), 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/QZAPG1746965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ff0ca8acf31a2ac05bb34d12fe9834677bfde774ccc5bba73da5b091e0376. 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/QZAPG1746968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ca8d3ab5550f0eff88499dfa872a16a45b5da361b61cbb7735189ba7d90b0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZAPG1746969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cc8482931b014644e6c48ca87b59e59eebfb66f53bb766fb7dc21facfcd507. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZAPG1826990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02335e0ab660d07eaea5038a07e293c688bacd707efc7d313923f249fe0c79f4. 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/QZCE61878637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff810f9ac37ff67be54ba39bc02eb8287a0729b06c46cb92c2fbf2a30a95562. 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/QZCE61878639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaf338dd36d27226a8ca78e5bc49e06f108d4859a4e03868d35f330c54957a3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:00:09Z), 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/QZCE61878641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd384d84120730817f334adf4e0de2e569871ade4d71f0976dfda754ea6cf7cc2. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZCE61878642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10e44accd08689383f43939f5a256e14b1a9db18f5c84e398ff1a61a086b1a3. 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/QZFYX1919134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf6be4fc6f8c63449922f50f93697c56ea34e941525b0f55cbc0baa79cbd193. 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/TCAEF1962269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f47b5d5984920e9c90aba996fbda24ba696c010dcb880aabc41a5f8a94105. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAEF1962271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833e50d569621dd2709fb4188ec510a72273b33c0f2eddbcd9dabd6c7f515230. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAEF1962273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec0d747c5aeed03a37142ad05f902a4948157c3cc6d42b0f4c276ab27ce9a11. 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/QZHN81987583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e0d90a28bb20faafb6871a040be99ccfc44dfa36d774baa37a140da8f736ee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62061786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba147ed7564a97a759fe3b47bda1da2a72168188782d7a37a5ae42bc03b81a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62061787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad892020ee3e7e0cd7cfdbc30f92a4906021529636246fa2ced65c1b3b264e22. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ62061788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87444c5bc99209ea9d8b6b01028a52e31ca5d325dc2a80f2246f07743e305f21. 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/QZFZ62061789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169baf5f533f43ce08ad1457e78b0b2a885718047c244d016236bfb70684d43b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ62061792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df25b551d862f5c09d0d76556d32a5a76c86e8632b1772ff642ca52946233d. 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/QZFZ62061794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe99c7e7803ed9b5a6b2ebf4e0eba11f00bd8f795b0d7a96a4a912ed518bc505. 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/QZFZ62061795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af374317f63244a5f36e687036a5c0c42ddd6a58a10f134adde8668e2babd7a. 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/QZFZ62061796.
Selkie Warior (Tides Are Changing Theme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a80f6e8b594ed0652e2c00894230d8b85a3ee11768922cd52f5319eaeae235. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWV2045110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11820c64dfcbe99a64138acda682c80c71efa72bff11c8e69cc9c7e7a29a3a16. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES62202383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13e8e2610400b9151ee780a539f3be9d79b3e9d934820972920e9f3a90be2d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:07:17Z), 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/QZMEQ2325549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3b1d2f216fa40a309cf2c4f7c5defc55e02e847562162d1c2652deafd1214b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMEQ2325553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf3a4cafd85d77fa867746d407e3608e2f35feded5adc526a95118b6d4467a. 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/QZK6G2532871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ac271247790097f1d92839add64991593e0e8bec91cfc68c11d84fe659dc01. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZHN82509087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35258ea1d70ad59c3fb6a9bba71f905093345a62ed736c34f1a02ed9caae2e5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:59Z), 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/QZHNA2517164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48056e29f416a7bf330ba476f9a5edc41afca42792740c80b43fcc6bc8ccc94f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNC2568688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb714cc71cb0de38e2229549be32304000f467ee30682a813ad98d1e41eafe2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6N2571773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c1648b3746da6c4403b942674714167d629bd3980dfae016c07693cdaef841. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6K2519838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf3a4cafd85d77fa867746d407e3608e2f35feded5adc526a95118b6d4467a. 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/QZK6G2532871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e0b0f5c4e989fedc93abbb37a437a92b78d8610ccc103403e9c143b7657f50. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMEN2542171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8940ce2dbe63686c71f5170fda31f1fd8ca63c30d5a576d8986708ec30067860. 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/QZMEQ2548403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ece344ad7af97a7fc0f5c3c206be6c8de28360f5313b39c69706d21b08f436b. 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/QZNWV2584614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7b9ca54a6f643366f40baee29d7a2c219aace462d0bc4c862dd8474546fed1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:24:52Z), 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/QZNWZ2577300.