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 0x9492bcda0bc6b0470203e40242a0a96a6502058870c940bd9ac9f17be208360d. 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/ef11dc98-8f47-410f-bceb-7872f19aa03e.json and https://artists.proofprofile.net/proofs/artist/ef11dc98-8f47-410f-bceb-7872f19aa03e.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 0x750b6397f5914a8953d6002ad0fa3cab3a041746b229abcd8d8e9d2498f01c88. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BCHFD2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e1a7f8a67429530fd2ee4052933e7a45b90d00fb9e872f162de945e6be103. 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/BCHFD2400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665280ef1b4e07312b80c38a1f9770c46a66dc2b197c798fcdd32597e20e414. 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/BC9PK2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd448343b710d3ae83118d573d704065b026b591abf043562ee9de8f8f6088511. 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/BCAJ22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0106335cbc8acf4022d72a3209d6e3ebd7e59eedde60ac784e2c11077c7c77e5. 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/BCQKE2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd48dc40b2e50b3a38d383891d68f353612e495d5d190e9637cce309bc814d0. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:17:27Z), 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/BCHFD2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4dcfa493e23ee8d43c035cf596b62a287e92f24536f9206c3ea713c6878b01. 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/QZPEW2553194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1214d1c41e343e4ff3e73fc1217799b188dad0943db9130b0516e09d692029. 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/QZPEW2553193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbf6680dc24f835673a9a9da6b91838d387919d11e8c4b5a344f51a21adaace. 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/BCHFD2400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8445c22c5d1baa8dd23a1e0be1ef9173c558dfe687d0cb81b3efa42d6d0c0ef. 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/BCHFD2400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fc9c48ac35494be470568b47a589b7486d473195777d624447f815856ea0ad. 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/BCHFD2400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa662ee0905dc772413bbe98af6ffd9bd05ba648b97437b2692bf924982dfe0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b618ed4c292abb7083c30f03cb36e94fa90d2ec6c22c7e6108bee0d75d0dde8. 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/BCHFD2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bb87c87384bce92f9b42a171b909aa7b942db67defd044f7095e8693d1bfbc. 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/BCHFD2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd54aac2ec5951713ea73d739ba8b8d2575a76b3ce63bff2fdb4f721201e973. 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/BCHFD2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4eaf40e986e6df0a0a5cfc0d9d0e8f66c04020d6eaebe89bfd17b51d9056b4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCKON2200036.
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 0xb3e2113cc12b5fce205a14f85a61251d9732548ef6f2c2038898392fcd84f810. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCHFD2400155.