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 0xafe407f25be400746fc97f62ef149a20a8fd2e7a1fdad4433899fa786598a65c. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/522c9cf1-b619-49ff-9737-ec3c44cdedf4.json and https://artists.proofprofile.net/proofs/artist/522c9cf1-b619-49ff-9737-ec3c44cdedf4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Naughty 1920s: Red Hot & Risque Songs of the Jazz Age, Vol. 2
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 0x6e85cc12f9088986187e4b9ff7e897aac7a18e697f201ee6ef3f4c441f21de40. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USM2U0804391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2085a384dc0c0ebd79dccab2033fff4003189e88ae8e1a2f1fff118b30317891. 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/USM2U0804392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911789fb5fe18209859a2c02e39feacbf3bb4acc65b6b98fe7038c8a55791a9d. 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/USM2U0804393.
Coon Sanders Original Nighthawk Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17401fd191e79a5a71a7c7ea4bb7099d078d2cccc8efbedc39f39079f65affd5. 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/USM2U0804394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada8a9ce6b1115dd1e2fa89df32495de7d5bd260914b9f2435d511fc23cc66fd. 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/USM2U0804395.
Ben Bernie & His Hotel Roosevelt Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f9c85ea76320c32171a537fe545803468ea475b9bc2ed42954b37c98db34e5. 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/USM2U0804396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4987bc537e49c02c8237bd7849f3384159ea53b8f8c7254391f995b843bdfd5. 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/USM2U0804397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e0860f3a4cedecb58c4cac6647da78431e47dfc81166e3d012b3cdf03abdf1. 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/USM2U0804398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc985f751af8d4de15c8e8ad2840dd6c75fc8a7a9ea565c6781cf42ad90c0a30. 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/USM2U0804399.
I Don't Mind Being All Alone - When I'm All Alone With You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7dc88afa0e149c05fa93851b976376b500e083c43c548348fe05ee392f8f08. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USM2U0804400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cdd805d31d5046053134cb90136247d2120b0f1e4f5f3703c3a69207579d71. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USM2U0804401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe561f966461d29414ac17d8ed65b1b18c01e00174fb0aa72fc8cd5d8398a3a18. 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/USM2U0804402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691b0b18cd716a0227a5f2cc1f44ab8f3fc3ace0945eac127a6b37a5bc449a9. 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/USM2U0804403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ddab0e71bb2f7cdf4e55a79ec1bab21261e223a1a27fc956496c1d971d3664. 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/USM2U0804404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf147b829c0a0dc87257c6b5aca4e5f3cf769c9b75ec41c2d8f614597f4a8267d. 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/USM2U0804405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5bca23e06f3b0c11891129f5d34c29fcfc73157bdba4ece78a20367a7a3e8. 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/USM2U0804406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a321d749866e2c9f20e7b1527a0343df9efb802632440de1bf124a6b9a87de1. 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/USM2U0804407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175d6fab87b6f193d8ee3f43f7de00e24ae60674fbb111e59c2b7b0f7b865001. 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/USM2U0804408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525d3a665ac214c5a288d63275960925e17c24ade0d77fa181561939c05707c9. 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/USM2U0804409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f5095465b03e9a0036db0c4929255558e3cd83dab36816d25df61116ac07fe. 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/USM2U0804410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34a10a1f3aefee9833a2d64545f577063024ce55144a1657a1051706c040c5b. 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/USM2U0804411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7769ae7af330716add2724bec8cfbe3142864fa714c73701b408df383c49d4bf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USM2U0804412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf4d4efb4c076dfc1ebce9a032f5010b30f51e0f394c4b5c94b0874d1c42c14. 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/USM2U0804414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac70b2b41e9eb9d1a8d2d8fcf6ae820e271c0ac3eb56c8c808803c0ce46472ce. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USM2U0804415.