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 0xb3c5b16ae86a0cb9c1486c681147ac1d725201f97625a01dfe71a0a54afbde10. 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/e3acfc89-1896-474f-ab79-bbb9b34cec49.json and https://artists.proofprofile.net/proofs/artist/e3acfc89-1896-474f-ab79-bbb9b34cec49.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 0xa6034fc4e83e0bc999b4b1d87b5bbb80439add9cf07415becdcb2d38374d12e9. 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/HKD012293215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76ddfd4df66e4bb163a41115135ae30b1f4ea8cffa6e2adb170726bd5a9045f. 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/DGA0M2397867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc595794733c4beb488a86334ba753cd935eb2c59619441af1e4b228cd6a1b505. 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/DGA0L2394648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce569dc36d939fa3e2fedf367450c8b1b92f6b520c25672ab6082ee92db78e69. 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/DGA0R2314092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a131bc63f760d5af3c1b33189cd102295030493d2237261f8055a7d77c26a62. 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/FR10S2464251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd3dd5ba41b1cca6e854aec1544b5f75a5779f1317d1547787dd466a58e55b9. 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/FR2X42476616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86369642986a10d0e9396f812efaa91737e7e725f52b15e6e200a7e2254a1db. 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/FR2X42476618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeabb3bf812091e978e6502daecb40145cc3aa4395fec2b3522f16bcc6917d1e. 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/FR96X2419291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1fd465536901fe8a5d741fb8fdd5eaca343fa6a50c1f6293b301e1e468d16a. 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/FRX202455120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856bccfe1aaee984be93946ee172a2cb896b383171d05b82d22cab2df26803de. 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/FRX282458728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc1afbf377d4ec16346abee6c5bfe4bad7b9cb9c256847f560118baef34a0a6. 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/FRX282487371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c462f97a949452876841d02d871cd09aae5469f1f357a1fc52c20d413df01e. 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/HKG732457320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0818f5bd86100585f147b99b18ac631566ffddf13ac8cefb970f0960fd5f66a8. 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/DGA062448168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb14c791ee10629417418b773f7cc579f2fb0adbcc085fe2642e2a30b4db47. 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/FRX762431089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa1df374ea0c6b8a2dde803329b69bf745383e64fcefa08cf161f06039a1a3. 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/FR10S2404300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d9612ab051b12bb1f33126eac2b3e25095b48e558ba4b72f45b9310e591424. 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/HKG731697766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3226146fba76c3db9bfa6d0a3f57f94144102e2001a5bd6f02d3193000c2c980. 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/HKA412300484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d45178563509cafe29876da70791eb693e7892447cfa8c1d29f607e812d0d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:42Z), 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/QZZ972339372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed100f0e843afe46c09019a21ff75777390c5c07f662b8618aaf9c7022c2c4. 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/DGA072309822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44d7486418b69757bae7162afb15cbbc36cd2fbbb1caec7574a4caa9ecbab2d. 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/DGA052314232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74acd33c79979118c371b8003f4784d9446d9545c583f966534aa48f9cdda383. 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/DGA0R2343603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b2c271ae1bd1ddf46d30d9f15655d542fee2b9077b3fb2597ff61749dc7a5. 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/HKG732268737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a5a54407e1fee671a3ab8f978b929173751b5e2c0b80269fb2e8e08e5c6b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:11:11Z), 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/FRX452270643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb615c28015d821dac4e95b3d5a85657a1a69d4eb448b438af92c2753e0b8c6e2. 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/FRX452270648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccd232a68bb88c7761958e9bd5228d2f2f5891392a588c2becb784c73ee1e4a. 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/QZZ972333858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dff5efab99a12f80a15ff2860f2c14230b6e4b01d6d8a6410d946234304d57. 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/HKG732246240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c872eda848da12edbec4568f587e5ebb0d0a320f50a9e900ec6189f57d85fcc. 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/QZZ972331946.