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 0x43a9a8021a5ca4e75d6df81dab84cd9fec7a7dd8b69ba52f61dfdf692c03f170. 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/4a9a27b9-42d5-4463-9406-a709cc33f482.json and https://artists.proofprofile.net/proofs/artist/4a9a27b9-42d5-4463-9406-a709cc33f482.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 0x197a1f3066a4ba2d6bed4ca324ddb2694543e0683f68a21f442a43d11183cb8f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ5FN2436469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6204c0306bd865b2317235256016677d5920d454b95ea50ffbec14060148b54. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5FN2436494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d7b74c9e33ef0726d9fd92744fdcc7bee3ef0e38e22c133a0436a36a07995. 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/QZ5FN2437472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59cdfc6e1afb2111a2a1c2a6a05e46e7c87d0606fc8cc3321fdb9093a3863ee. 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/QZ5FN2437485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1d996bfa691276761e04a563d3f86147ed68649a3c5096034eb9536d2eff5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZ5FN2435302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eea310e94f4b576a41988d99d7d52a9fcb4a44a1ffe0fbc4fcbb4ea2e7b840. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZ5FN2437508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3171c2f035fed6650f1fa3768f7f8d7b79ecdefadf874f33ecb2b0cf560898bf. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZ5FN2437521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396854c23aeb7d82957a48a0e5a6c09f94beeabc4642b10719f37fb382b34868. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZ5FN2437537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33389c13939f73fa1f49be768575ea3aeb8a3d4f5f00a1e02945fb6403700808. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZDA62297125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d57ee974566f6309b712a2f3f8468fe1fe7c506570fdddeb3df83bbd0c489. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZDA62293771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331b0c34eae63a9903f0c584793cd54ab9c97aefc5e5e3d3f435d78b49cbd582. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZDA62297126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd559b2349ce81ddd6cfe3c71aa63c99bdc55b9d3df2d2ff403c05aaffe4334fc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA62297127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9733abc1c5d31561349f734ac58f4fa4be6cabaa35a23f8ee0fb8e31adaac2f1. 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/QZDA62293408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11c020c315ebaef1541325c17ca75924f572ec498055c34a6fbee563a56b70b. 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/QZK6F2128449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743adb5b74517a589eca3e60f5e2a2065dde8269d3cd5d520cfbb3c46042cc13. 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/QZ5FN2435650.
Loud and Tranquil (Xenon Chameleon Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e51b46b1f688b2cefbf0cef5d78cdb48459a54591734a9c281f210161acd458. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USLZJ2374474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1103609d0e19bb503e12138d718c16bbe1193ba05d7c33c0f083a66ad42f83. 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/USLZJ2314405.