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 0x066d32fbab7e701f37fea7df1ddc36bf6e93da461d2f79859ee2b26bf1bf566d. 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/e39c8674-4d30-46d6-9ca4-c2951d2c4324.json and https://artists.proofprofile.net/proofs/artist/e39c8674-4d30-46d6-9ca4-c2951d2c4324.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 0x4fa3596d4f907a4d71f64f5512efbd4576fe9677873666cf3c4c4481659364d8. 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/QZK6N2156762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba49e3c13e750c64f7c5e43a3f0468a7a8ceb124f8fe152fc21c7b37d0a22b5. 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/QZK6L2246462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c12c67760ef2dc2b462f14934e6c09b8b3599e87f6373a75c708db7d085e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22359494.
Dimelow Session #2 Ferchosre (Freestyle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58efbec752c5bca89265e95ec615fed5a8ade37b0b1351351da98a809156141e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2482008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7563aa45822472a02b0ceeceed9201584cbc8372c1e4a4a7521932169e446dd4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SGB502299132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501f939356651ca8d7c78775ad4bd021f463ba393610315f309d50eb98171b47. 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/SGB502310282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6117d178157ed77c6e89d5e6f472a95cc5d01ba1c5d3175a43eab0d2dce29ba2. 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/SGB502310288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed3bb8afeeaedf9fb16b479bc2409e6626255830e47844cea27bc238f1aeaf4. 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/GXBAV2390476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23c3655ac6cb4e1a9fd546be4bb53823c2de5f73e54c8416a71cc52e3611b6f. 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/GXBAV2390479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6478e2a304068b0c97e231faf9dfff771c032c58e59c161c1269ba7322dfb14. 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/QZK6N2508765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d48001042c6c437ce394fcb7f3a0617b01fee50d7a2555dea76a7b6d80b78. 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/QT3F42413813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb901055804d10055502c2f535b5e80e594b653c16720e2078c63511b21037c34. 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/QZWFV2459850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e49a643580b32fc249d8f4c928c52442f1ba3f07d0284b77e36d6e9245d8b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB42417557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b4ec7461cfe18cc29b82044fa751c3b3f7d878096c6c882667e5e3b34d615. 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/GXBAV2277672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca823f80778358565988978f02414f2b5f9cdf79ac7efd79ef62da08af62b7b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXD7G2336420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d72dd21add0504d0fd92cd6968494d6554cd3016ddd53e572abed838f6b84b8. 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/QZNJV2472426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274746b5d488fb773c787c5dbaa5da9a80f0f1aaead074940a1bc1c1f13d652f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2461914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a0bb56ecbfd2e7e624ed4ecdfa34f091233480ffc47bcd667539e5f44098f. 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/GXBAV2493243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe177bffb17ddc15b3e327c44bb3fd2804729ff242b238bc9459f5c412d3449a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB2412022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87342ad80dcb064763d863688f8285c7c36b39369469e5bef67a2a067b2ea262. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9M2312115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762ff5c99333cb5fd861a3127b9ad90595e135d383457c0263485cb056d84ac4. 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/SGW502308885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034766736e03c002883e3254ccc623442a36f54a3568ebe26a9adbe55dc93890. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2375180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870992e510a910854423b272987bcd156b48a7016911c77971b53281192b4d55. 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/QZ5AB2391979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0294f21e247604b0902e14b42ea1fd2216c7bbf88c8a946d21550c7ff5dc10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAW2218605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b8b8a92ba2c916cb960a9abb361ced9689d7fb46f78e0dc4b56998351310b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2262376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53962cdd7f611cad95487823a2f1fb4b37bd768def3ea9ed0defa46a71cabdd4. 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/QZNWT2215585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a66d5c4b627c30cb77303d776b167f7b50a4d1bee31f553b8d60954e7498926. 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/QZES82230924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fd20628e6667fb5ce79ab74cfb33c866f5169505f8709abcd98ea51a664a15. 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/QZTAU2100870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad5da1602da4e2632cd1913fe513d5cdd601d22e842087d8d508f04e80d8a33. 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/QZNWV2181683.