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 0xa6cceaa51d2248df91ff43a575173a5bdb93b542fa7a3f8363ed2123036e70f3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ba835c3-dac4-4733-a0da-2a9c2bd85b7c.json and https://artists.proofprofile.net/proofs/artist/5ba835c3-dac4-4733-a0da-2a9c2bd85b7c.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 0x6043b1a8587778b5d16f2602c72ed91ac3ade6c1dcc9299cb93d64dc06ad7fb2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USACX2100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d18e0827da66f53ec6aa63df50bf6d113c2022c4f8ebafc9efab0adf9573c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAEH1913068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ef55430b992aaa87c2b0548a1e342730b4d013a06922dc3f390e9f7032261. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAEL1918154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe223cf36bb8680ecbba3f105ca620dbc91f74bcb6e5b1a6cc56b80f228f4aef1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:04:24Z), 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/USACX2100413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0f020bf56158c895c6dbd6561c0aa8a1b3f90355690bb4545af6861828435f. 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/USACX2100693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e533a3ed87bf07dc8984a72ad0868798b60cc9004e465141f35fd845b0ac7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USACX2200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec90a45e596e0453fb2defa39a6d7ed3d9f4c3f885e1fb99b549111053de831. 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/USACX2300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e7c7456cb639c2842cad7db239c4953454cf590d5884b31a2c43de72ad6e4. 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/USACX2300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9c3b9df8eb68fc5221faa9f246afa259b105bbff8778f74c9beaa9a4a566b0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USACX2300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec90a45e596e0453fb2defa39a6d7ed3d9f4c3f885e1fb99b549111053de831. 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/USACX2300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cc624126561b6dfcca82db526b061540b7e58c4ab90574186f5289f2ea0976. 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/USACX2300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d9f1e1d0b36ec7096ec9978a4eb6da63adaa1422cd81da404425bea81df02. 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/USACX2300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc71d52b97ecfbe665cc901dc21a99512d92c3a451278771b343f9535ec1069. 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/USACX2300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb8ec562691b62d31de6601581203c44c3273a3259262d456af2c09d896d05a. 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/USACX2300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957276c9242c7ed363750e9e4843cbb4e08d52d7352c19a90de7cc5d39895ff3. 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/USACX2300438.
Essential (feat. Cephas, StefanOtto, J. Carter and Michael Peace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da6d46d7a49d06d229c40233395b17b9324df7561fb39f7007941cc80617fa3. 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/USACX2000816.