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 0xcfc91f80b4d1c9eb87ff667981f1bd2e7151ac2afa4a6c9d346f24325d573e33. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/140564d9-5bc2-47a0-a5b3-1fb0ef2b023e.json and https://artists.proofprofile.net/proofs/artist/140564d9-5bc2-47a0-a5b3-1fb0ef2b023e.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 0x4dbb6b2a49ebdf02c17c5e2b3b3424effdb4c934516f1d9b8db57e94cbecf5b0. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZ93L2044190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed43866ea2bdaee118671c0dcb30378cc2a5dd34fbd765c0c460d88322fa7d5e. 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/QZ93L2107293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2033bd36e9b6c78cea56b610589ba6f3da55f6beca06c1525244d40b3a386c. 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/GBKQU2189628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb16dee1c5273881592443e50ea8cbcf310fbb85a123720b9fe96386cd9f04f6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBKQU2189630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37f280ca2d061d39202ce2f31bb9a24ae46122c0ba2ea4572b6a28675fc0d6e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBKQU2189635.
Reborn in death as the cherry blossoms fall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32608d9e07ad89b6a783d678266af00b36e462e69859bee79b2c1997a840e065. 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/GBSMU0123528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af54a518a6a3c7f455d21ceed0b3abaefed6617ea6aec7e98c5d1c8ac0a4b55. 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/GX38U2459125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857c6871b0296502e0a4106352247850c55680a5606a6e24f693721011e0c029. 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/GX4R52320178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac08b18b73919cb9016a21398cad442da61a7959c50677f1df1a598ce7aff7d4. 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/GX38U2492561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebc9b136e87f4bfbfb0b1ec1c3bb4b4dba0b4533d8ad4ca28b065b580df3e8f. 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/GX38U2300912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24eb46061f2a13e7052028a9ed90c4fb04e322282c4b873032dc08830374066. 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/QZES92210840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed564b5112e9bcc88041ff7a8e66d1cbdaf7151d55057be05daa101a8a6297. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZES62222883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe02e928fd6ee3a3ae2eea993c9a1005200b3c2fd7d37e424310ae57a85eac0. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GX38U2169033.
Piercing Snowflake, Water Shield & Blurred Moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba19790460625fb7245385f25c4ca3f26fb585a0d62eda18da9b3108b246ed0. 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/GX38U2172684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991ce5994f36d320d677401f84bfdad697a9de47513e4571ad474f0835142e74. 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/GBSMU9852428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493e549da2a7ce22af98ac2092142ce75b151352e50cd1b9e238cf993b78eaec. 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/GX5MX2423204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c1bc5e923a6ce55107141fc4eecd834cc015e6f14ccbf808712a07dad08019. 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/GBSMU3908991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1805a90755681b58d7b9382415dfd420f60ccead63b6704e45d9eca5862f435c. 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/SE6HN2493782.