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 0x1c99a44539384d27614d3e3de583b73fa8d50c73811046cbc24f6d58d40e3480. 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/03f0e4de-ae10-4aa4-a43c-fba34aa1f4b2.json and https://artists.proofprofile.net/proofs/artist/03f0e4de-ae10-4aa4-a43c-fba34aa1f4b2.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 0x50fe2974e233ec3c0051ea633d7fcb89eb554c9af19db2f02d5051a4d062f328. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USC4R0506296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e738ab70dbade84638754583c4bfcab4e4f8271c8a888400a2e3608486185fa. 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/USC4R0506297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e3aa698c77adbf360847f244c7918916fc8535bf4364d9537e1c13dbe36637. 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/USC4R0506298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041bf7a62f5f321806aefbce7e1b57597b0c23001c06ccc8f2e74d39f139c3c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USC4R0506299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944322957c4c08d10e975b800b205a87099f7bd107e8c4231e461031bc1c3d40. 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/USC4R0506300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ae06ba0ccb141cfb6409695476d9605fbaefdffdf6da913427fbc6356ddc4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USC4R0506301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1975906f2c39c714c437676d7097931ce1191931e26e0cca06efc807722d034. 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/USC4R0506302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dbcb99c2f531bdd4c1b885c07b90cf535b5484bf5d16c17179d0b509374243. 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/USC4R0506303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc18234d66c981aaadddc111470402b8a29e3f04a846313b6599c4b5f1bc411. 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/USC4R0506304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e51c6f46c81d4ad94eeccaea932ee825bfa8070b7884022db5731deb066d7. 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/USC4R0303377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d68cbec58daf45d014d74800b56ec33fb0f6279c040cae6dfd2a37696d6110. 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/USC4R0303378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f12e32601c02b3726ff2e8bad7e71ab1dcccae650f86e895065aec42b60ae. 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/USC4R0303379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2869848784df321986f798c143963a8f9a8147fe47f130d7f859028d0bbf571d. 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/USC4R0303380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24bf5840ed8e5af20b6b87ef235c5288aa011c253b5f8608da2cae5965bf296. 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/USC4R0303381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766088b594925f07d7ea379df9f7be73ef4c0aaf989d3ddad09d2b3aac93d48a. 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/USC4R0303382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7338797f214af1b8841924859d729fdef38c094b60892ee8590aa6dae985d329. 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/USC4R0303383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ad38f5e34bc6fc1801d520807fff1bd3d44be47e9f5f4f906862319164d46c. 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/USC4R0303384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84033b7f12fb97f8bc6aa80f4cfb179d67394ebb1c9878d30b7c756735f32ab6. 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/USC4R0303385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726861dbe5080e2f41c18742c92460d1da8ebb62c49002b2f0477fc583bc9612. 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/USC4R0303386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028b15a15bd9eb924b79f879cb22035f49d2aa9690c796ad326d1cae48db7ac3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USC4R0303387.