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 0x0f1f93ef29de4017493400e253f6e78736194b0858233cefd10a23ac39333e07. 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/ea09c60c-190c-4c92-881a-809260b4e1a0.json and https://artists.proofprofile.net/proofs/artist/ea09c60c-190c-4c92-881a-809260b4e1a0.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 0x1526a0278479f55ae238759e2e3cccca4d5cf5523eee7083c3372d66b9fa38b2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ISW211905005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bda9659e7468b4884717ed6fb99b7af2b411266421e060545483d3f41d10c6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/NLE422100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29c0f704b02cdcfb3c8d73879aaacbf0308076c36a265ba0c55f833b2242a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE422100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd3a3112549efa28e293205fa6ffced3b1556f39f7889df234c414d0c5c037c. 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/NLE422100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e9c9e7f1c30cc6cb5274479b3d2b280bb067619cd72ef78af47f7ceda7e2c0. 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/DEN962333313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b033cc2ec1dbfbd182de0d12a7125cbd4746ada3e852c6f165b055ca49c259. 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/DEN961803470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a21fe6462d96caa240a5f53986ce82bbb79bd23f8dab66af3b2549e97f37c3. 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/DEN961803490.
Physical Description of the Last Human Beings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae93444521d6a087a8485017898c7cb5e53ec524a4f04f8a869ee5ab014c1690. 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/DEN961803500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf982840605f09fcec66d58a607413f87104892c0fccb84f3815d7f693acd5. 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/DEN961803510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74280c12cdcb823ebc9155adbc9c6a5ce8c0a6a12db98301a413f1161a35ca0d. 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/DEN961803540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda674337b0912c3f59b55f9185902a7b6c67efbea29c97fb88ff6bd1dea28a9a. 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/DEN961803550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf405317907385f362bd3f2c3363574fac9af633bb3cd1c9d0a6a37847cf80e68. 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/DEN961803560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2c584cdd39baa620fca3e566d35a946ce59b6300b922e22c914cb4b5850a10. 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/DEN961803570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2d0790fffb4002ffe47f85b2cf22630189e3172ed1d272b60340504ebbb087. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEN961803590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dad460ce99dc30ecbce5de67d1e6338bc4bca345d09a7a6f0b1a92ed3cda19. 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/DEN961803600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a70a635722cec50f5eebecadc77ab56d84251a83c0c9d240938a1efa97b61a. 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/DEN961803610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a37c663bebc1d5f3b7e7128bde45a278428988b244715b0eb537caae2cd4820. 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/DEN961803620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c6194d7db0dc6a534adc0570594dcbc36d25c7a760c3b53f4846ed9f264ce3. 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/DEN961803630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a73e48eafa4c79abc8d8346ed4c6e0ab14b691e0a8d3e179cd5b17ee9dc6a04. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEN961701180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74280c12cdcb823ebc9155adbc9c6a5ce8c0a6a12db98301a413f1161a35ca0d. 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/DEN961803540.
The Next Billion Years (Foam and Sand Reworks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7306a5d6e372803ed4ab08088c7b1aa7f6453584c0cf26ba0baf10978c791. 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/DELV42200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf5483f0f0029683c57d03828113a580a2b6a05c9f72ab3293146fe5bced7a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DELV41900640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeac72e4cb97b336336d6a9c83d834bf92089e12a8137f33983d5aed7c5fb798. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBKPL2007221.