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 0x2214b306e377dce64661fa16ea7c6760c2bc8fe07713456c5b237759230d4858. 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/5e5eefa3-55b7-482c-a59c-8d44cfdc716c.json and https://artists.proofprofile.net/proofs/artist/5e5eefa3-55b7-482c-a59c-8d44cfdc716c.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 0xc3d0a109cd06a500f0ed2070f96697935339d9ade528fd2ace5fab8d36d5cd00. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2377061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c89c2c19b7385403b9e50a9df03e97719fcfa141e6a1fae127ec9bfd3bcf027. 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/QZMEM2376358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e00a06f5b8dfcd0ae7a0fd29554bb0e327b31178da2b4da98b0db12c747a5f. 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/QZHN52384613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ed8ed1e3ce280dee0569e0e52eb9caf55fb0f9883f532eea213aaa1f63154. 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/QZMEM2376359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d0a109cd06a500f0ed2070f96697935339d9ade528fd2ace5fab8d36d5cd00. 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/QZK6Q2377061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be03f2ae175a537512a0f42f56dc77f8d58f04a3c1a24037aef11ec1aca4b02. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZMEM2376360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c53fae23330e88892a410a43c44cea8f19423c6057d2152de21a0348d7093e. 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/QZMEM2376361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19d4cc8753ec4b67310020a92fe0f5bf485f8f0ccb83047c2f9383c7eb99aec. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZES82308269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb8fd7f7856609bb8981ba13ed348d2bf4092f090c1dcd557784ca82e562c71. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZDA42307521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44adb26f08cffef622496fdabebfec82faef0ab10918fa18b6558dde21d9bba4. 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/QZMEM2376362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc7c38b6c52119ac45a22c5283307c33408b857663a4ab03d1329cf0b5a99cf. 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/QZMEM2376363.
Sunflower//Yellowjacket (feat. Red Naxela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1327884369fef293fe1a81088682bee60c013dcbf6c0d619a37ebf921e7bfad0. 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/USLD91749944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77961c86bb871ce56d1a585b5677ab62b84914bc0bc721b9b0bae7bfb00d1a95. 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/QT2VB2451702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01e163647efffb820104ad09011413517ef2ab79c5e9a7111ef95b75c523be. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT2VB2501899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a70953846e5cbef29a38e8fb30ce7b7bdcb1c30d8b91e130e183cfc7e3b1d3. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QT4K52501749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798974ccd2fee3f6a9fd1fd9a32ab14e2ed788ba7be73e3e71c1cc29d7cea502. 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/QT4K42567256.