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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b08972ec6c49aaafbb77e6c5b0c0ca9ef53ec3cfbbc6e434367c96868f52e2. 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/7c43d07e-e605-4393-8503-023cd2f36f92.json and https://artists.proofprofile.net/proofs/artist/7c43d07e-e605-4393-8503-023cd2f36f92.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6160c63545fb4c5f35adea565b9cadcf8e8d1f2836c3a68982850d51ee0a4f99. 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/DEG441890917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad222f8051b5b9c1d757d6fbecf10a8ed487b10f72bdb75fc45426301c92bc44. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEG441890934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf064efbdea22860537a230f274c774cbae0d7f48f8a53f5aa982e57ae6a9ef4b. 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/DEG441890918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b8f9d823869c0d02a1dcb5799fdeffb69e380afe00a5292af1e62f533c663. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEG441890919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6e40d2127f4a206d6bf4f4742d05cdc457d51a3bbbef79fa574228d75694c. 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/DEG441890920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a177014d4ebf484ce160ced83224f83897247b0bbbb07ed834346404b278d0d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEG442291210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9e79f4454ba58cd3fbaa594592f862e7844ab4cc61af240dbb0a41869f9756. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEG442291213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ad99236bcc685a6faa2064fb09acef3a9997cb445f75488aeff6f41f165d3. 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/DEPU32202597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040ade20c71fdc3c6b4287737a3559d97f3cd6847099bfcbea985b38ea4a12ad. 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/DEPU32400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f83bedd68f5d26f6e712675fa0a4abb0ee5a83724747a171fb63942c4309fb. 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/DEPU32400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab4d629aea9c298f3e310d7aac1684af8cef6136a3183604f8115124b93ef4. 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/DEPU32400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30393684932d317d22c4fa16a1186a22703aa5482d9bf212868f78442834e90f. 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/DEPU32400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f854a5270ae20606b1eed0d0a6e15df32427b6d3e3e2aa1914de1d4245810d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DEPU32400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f508467cab9ce757d46fc21f55e21ddfbfa5148404f629e2f9683e4052c015. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPU32400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ad99236bcc685a6faa2064fb09acef3a9997cb445f75488aeff6f41f165d3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPU32202597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f70d1aa46c557ff726bc8ee850ec229fb997136762f805e9c6e7187ae5854dd. 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/DEN961600730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f9502ab9167de49353db99ce2906c483eea7371fcfda69205db39f52b4336. 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/DEN961600760.
Remember This (feat. Kaiser Quartett) (Naked Version)
A Space for Lost Time (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa630ebe6c589ef3ad1545cdb5571f4625e7630c20d80c39e23c90e1bd73a0f7d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DELV42000685.
When You Were Mine (feat. Kaiser Quartett) (Naked Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28c3b6b5203c39db260bb643e888c60845df4b7060301e5e92eda7a0bbb23b2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:34:43Z), 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/DELV42000937.
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