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 0x85181a2faa951c59e99262a4bfea531559e9016df884dfa0101dec2a5921a7fb. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a32edfe1-7927-4458-a179-26f04488353a.json and https://artists.proofprofile.net/proofs/artist/a32edfe1-7927-4458-a179-26f04488353a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Around the World II (Compiled by Rialians on Earth)
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 0xbd6b8176047d6531e1847a27cde833bfb99bd0033961bb47c00e06e3a02559ba. 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/DEH742007114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36e15b3f156cd323c02a45dfb7b837b64680c83f9d050d498d696ba6dd3c469. 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/US83Z2044924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0471a436431998e947ec235d026a9082b59f0720df722c61ebb5e61c909a1caf. 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/US83Z1924339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de5787256405458dac7b07249713c788405c0669ace541c74cd39ca2cfb977. 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/US83Z1924337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09c16ed30bc05ff1432b7f849158a220b14862d000530aa468cc49732aff4f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z1924326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3e8eb25b0f540fac144e1dbb6aa2c64266d6f9c1fdcf2b6723f904296e0f58. 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/US83Z1924329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891d02ddd8681a0a1a33c7cee698a8efe572f20b48336c03d90203ef58f044ab. 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/US83Z2021119.
Oasisphere (Compiled by Salvo Migliorini)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f39cf78c20b90dcd52994a92dc532d113227b83971fb413b145f7386249b43a. 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/FRX282199246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695586d5b33d974f42aa59ce5892cc397eeeeb451a0f00bce69867090bef5a23. 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/US83Z2022150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8377e7aabb163184b68f4177966b07d4f0b6d787486da26ea0ec4f2ab0655bd3. 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/US83Z2121108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04995e90f9301ec89fd1c04920b7ed92959fcdfeb05df3283384340ee2985c72. 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/US83Z2121111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162edf3b40c4d7f66b12f806148a1e91ec4706ce3350f378f9e8839c5b3d6c8c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:30Z), 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/US83Z2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21af936cc314bd8b6bcd35b3c9386b47a9b9d78da126ed65bc22f9870dc82af. 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/US83Z2035149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb235de4ce864cb2be742bdd0a31a2ce5412dd80f10ba2059efbc7b04cab7481. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:43Z), 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/GBKQU2104731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f516b9dd4974d292aca1b6c61968a0642003457fabfdf15646eeb82159e363d. 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/US83Z1917560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0486df23d34ae6bac037f9a962e27fec08ab4f0e5dc5b11d469dc893d84cd97. 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/US83Z2413574.