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 0x11ab0a4240ee8e4e85d2614ce5ee5546c02d84b31c5558f86acb2894a039b0d1. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36dc2ee4-e7a0-40b7-91ef-cb1a7953f870.json and https://artists.proofprofile.net/proofs/artist/36dc2ee4-e7a0-40b7-91ef-cb1a7953f870.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 0xe449bcd66b8b15acb454a6cbec830e0db8e0864c63771736f2be29de71f41e7b. 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/QZHZ62275394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90429906d5eb5af58a0bf0a38071d9194e66f8cfe413418b205b5977d3a226fa. 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/QZHZ62275395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5984c329d14e781de2cf17a973a5fdb3873b81a5279488540bfc0a9d3f5a72. 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/QZHZ62275396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dbf6fc554a74bf896b788a977ff375f639bcd5f229e5b5ee60b3afac393b6a. 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/QZHZ62275397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc575532e7d0be0e83ba295b0dfbe74e4766c2c592352ceb08a66446ad8e9ef4. 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/QZHZ62275398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd69574897585409edbfb8e6e6c0a70306091d4f73454ae99f60fb284bdd0f40. 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/QZHZ62275399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afaecf8d4a6c8982bc196659ec9b394cacf99c19e040dc5527dde52d0a2ff4b. 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/QZHZ62275400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234142879b5c1e4c037f6473411b0024a07bc1cb914243b81017cc87d808609. 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/QZHZ62275401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedee5eb8250cb9f76fe6251148976ce1d4648a9139d7a49cbadf73af51bdc877. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ62275402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcade82abf02a4977d5edc0d55c79b80238e8c111e42bcfbe959896b629d248. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ62275403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6641533d8c849aa6752ce26b0cd2ddeb926f8e80972c6a423bcda780357f4980. 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/QZHZ62275404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc804f06e99b445f95b237a7fd4bfc015908d560f4af2070f290d1365803007. 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/QZHZ62275405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08b386486d1d8182c97b90b52edaf881407e6e499f143b4f6cbbe13fc4f46e. 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/QZHZ62275406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a48ec24b54fcafed12218d72e059cab498cf445dd0b1bdab084bbe6a91169b0. 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/QZHZ62275407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c5d2503d65dcd41eca4fcb50fa3f5ea2670dc08859bb6527a06cc62763a7af. 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/QZHZ62275408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d86bcc44b86ec9307ba108877436c0e78c8d6225623566f932f354e5f0e85a. 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/QZHZ62275409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029bf106ac2c63e86859f03256b1242c74c2929c63135f03e31fb7483d99c328. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHZ62275410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472f29048325d1f8fe3eadd61017d2efa05ab3c17937a4363c287731bea3e3f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHZ62275411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0723335b69ec68d6d9939c636baaadbf9ef899eb1d937cb0e3f43bc0e0d3ec4f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHZ62275412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664f5a02f9e363cc928ec234aff1ee81002dcc276386c066f0eb26811eaeda31. 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/QZHZ62275413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ba967e56f71579572d5fc0aedac9490043fce6d6a4b10fafdd3cf9d53cec2. 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/QZHZ62275414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b11707676b1f25205749b21102436d664ee8768667b206c0f5acafab5dd5d44. 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/QZHZ62275415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022744c2d41b7b22fd655679cc8ce6f79d12274c638bfbd18ae09f9465033e4b. 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/QZHZ62275416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33950e077259ae1af709ea0a8cd4b00e93a96f2e6b7c04213f73b52dfdf6769b. 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/QZHZ62275418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a7c8d21f058fecf201c54ca467868597c836191b950c5493282f7609954ee. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZHZ62275419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e4487a358f2a6a583ea26b2845e03489d3a40de896c952ff79b0508bccf27b. 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/QZHZ62275420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff83c0543c7eac171cef17d1a05d395742697378f09533db33452eefd8285a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHZ62275421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18061109249a25a210ade99a2fcbdd54ce2481d2a08b98a3410d3db06872401. 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/QZHZ62275422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cff80637fd166419b2fd15d42b39addc28d44196e9f0a9b235dedfd42d2b538. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHZ62275423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe28ac810c54997d34390dc8edd56f834caaaab63551a63767ab9abfc09dfc5. 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/QZHZ62275424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8691e6eb607a94a747d3e19b93364ae3cfb2cdf4b9ee5bff1fa6791dc073c3a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHZ62275425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02172225edb94a483d6e64c48cbdea9a6ac247729b114357c9ca4dc4bfd8a830. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHZ62275426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794d96407f89d1b395d2473076d28a76d21287653a698a8f18a0867abcf07b0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHZ62275427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2a5676b83b0c5f886e88a6755bf3b03c1ad2a699a5e504fec0f40d85e97656. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ62275428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf28add452f5fecc2fd7acc950084819f9d3e1da1813238906209b2f426ae40. 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/QZHZ62275429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e03ec4dfb0549fd0bdf0e6704b3766723710b9946021bd6fa9f0e4de6447170. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHZ62275430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4216089f81ee69fd6ece5461a00a0f34ccaca444b2c8524c7a97ad45881e61. 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/QZHZ62275431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f5daeb238e816c06bbcecf8bae092003e87ddcf99ea947ed8c79b5ec31a5ae. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ62275433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e8271653671698af2f919f279e04f8cde0f20c1df344b8eb65e015804450c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHZ62275434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf584f35614df4061d69a9a49a43bffef94f628f75964bdd20c3a918b01f30d. 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/QZHZ62275435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02890ea75401b14845c665675b0f4e19e74b0e921be3f1f0855d8ae8e76063fa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHZ62275436.