thumb|upright=1.4|Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style)
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 0x77ed4716b274cb993e9440604179869bb8dd92e47bfeab63151d98532d078671. 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/22c0834a-d081-4bf8-83ca-a17a5f37bab0.json and https://artists.proofprofile.net/proofs/artist/22c0834a-d081-4bf8-83ca-a17a5f37bab0.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 0xda65097ef66e55a6c172ba6d8a406c3981b5d8e9282b77ab9227b9c475aa5865. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUM71304892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fd1e6376f4a9e31b0b7b7b0d06ac8be1f32cad88a0343c9c8e26069441160c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USUM71304895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7908bfe90f9c2074b853ca4f1191c9e273388ffbc81ef02211735c8a0b52d89b. 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/USUM71304894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34de5b9cfa62d27643361ca95560ef2c5eca107f182153eb84a1eb75be0742cd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUM71818511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad601eb20dcc27eb34db974048464acdc94730f57c5f6f2e95a34bb8d961d08. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USMO10000436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678b47e79d78f623ea6f1f658d069b7e5703e609f05417c44698725bf5b3b5d6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USUM71818516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2907e9daae43a817264ef94a8719f6a0673f6174842f2c8adb6c05fd879e557. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USUM71818514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f4dc5f23667087d753a50233514084bc9405f339859c2c151b5d9fd3d75f3b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUM71818733.
Reaching For Tomorrow (Expanded Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955b5d903afecdb74f942c2047245ffdd32bb5574f85e73b862962d3b4c41161. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USMO10400629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34395a5ecd73ace675ecd056a9fe62e835fbcabc4bf5d7900730e5f7d3badd0e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USUM71903122.
20th Century Masters: The Millennium Collection: Best of Switch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a346359ff55b6e0329ab5e841b12de6e650fe5c4e4c4a3b0a905bc9390d9cc. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USMO10000435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c120f1d5a56c2f439f5e416013710490bc9566c6715a07176fa4cf249b860f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USMO10000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefefdf225d45ecedf00dd093c9003d2d03061723644c72ff47e96c7a0005cd7d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USMO10000429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa583fddd8e8b0c4971dc277b798749c1f41905c9113c695b20c7d06b91deafc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USMO10000433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c311045ac35abeff84173db56fc6e61ab6c1644b1a6204004a6bfa88df09d86. 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/USMO10000431.
The Best of Switch 20th Century Masters The Millennium Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbada9f8f0a6005ccf494219f98c385dc5f2906d1d3fc84c491ba80ccc0d885. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USA2P1212146.
Lord Finesse Presents - Motown State Of Mind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553313cb1bcf84b0677ac9a60490393c0be9fe96cef67f39e445060ad24909d. 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/USUM71924574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8450ddb78ee1ca983f38cca48714e156176ceaa5375209f6477389e4c73712. 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/QZ8LD1961471.
Hitsville USA, The Motown Collection 1972-1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a080c7057ba0ebf1230baad35f834fdedde18fac30b1041e25e7e5565f0047. 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/USMO10000355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb0b4e1a15183c3197432217625703e57b211f61120b15aa2af09a5f4c5e037. 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/USMO10000428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa50fbaaa1ead86c299917abe3097a006d981e5f4287836cf9ca0578d06d7a1. 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/USMO10000426.