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 0xcebbb0e1ae6e169a922b587fecfad30ae490b3cca66a75977d39faa466cadd24. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1a206b8-7683-4636-95ab-a735dac6679c.json and https://artists.proofprofile.net/proofs/artist/e1a206b8-7683-4636-95ab-a735dac6679c.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 0x0ca13831c09adda5eb5fed8c1149d08364be73876289ea6de1bc4564938c87b2. 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/USERN1010621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e7d1d61296e9fe426413bffde11ecf1000cee1d6f5fd8e6abe49db3422c4c9. 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/USERN1010622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc312bd4e2b22ad3e4b8b8555e3f4a8508d96ca05689acdb10c7c2ef57281cfa. 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/USERN1010623.
Cathedrals of Blood (Twilight of the Idols)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb50a9752275d48a7264bbb5d0ad89ae61cc20b1799e9b351f2ec61955bc691. 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/USERN1010624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7479d9d54ecacf47f9cc8e64c65eb9b526f08d24f92d98527208ec01344b2. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USERN1010625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3850d3101764f5d90077309402fa334148869d0001add424b399181ae0b113ce. 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/USERN1010626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95290962cbc7e100e067223d4a0255a04b8c2ec57a62668aa050d7e2788340b6. 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/USERN1010627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43b2dc43433297539b2f933aea3b6e6e1f45154b4e056f4219600fd3c10534d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USERN1010628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95290962cbc7e100e067223d4a0255a04b8c2ec57a62668aa050d7e2788340b6. 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/USERN1010627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc312bd4e2b22ad3e4b8b8555e3f4a8508d96ca05689acdb10c7c2ef57281cfa. 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/USERN1010623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e7d1d61296e9fe426413bffde11ecf1000cee1d6f5fd8e6abe49db3422c4c9. 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/USERN1010622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643b4d5c358821ec616398affe1ee4090e02be67a117fce7dac67a819c03b250. 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/SEYOK2037534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a464d9e2261a551c38865e11f9165882b0482ef33d404bf153930f5f345f702. 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/SEYOK2037535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c8f7f4ff6b4d70421686ec6ebc0124a86d8e10b5f17ece53ffaecae97224e0. 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/QM4TW2028490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36276f1e6a16b1f9784c79e772e1382e9cafc054b7566cfa13772e8177a7b4bc. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/QM4TW2028491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aa38da74e23462af2d23c0ffe52ee0c463456ce377008bf84b0550aece0733. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM4TW2028492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eb95bb7347e516c541a047c8646db9ae31e0f3cf684f8571bb15d75683d5b7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM4TW2028493.