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 0x910b632e982b3248b38f3aac2ca2d47860cfe95782f96e0e126abe7e3f07480c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccd1e265-5036-4a6f-bbdb-4ba2ac9699a2.json and https://artists.proofprofile.net/proofs/artist/ccd1e265-5036-4a6f-bbdb-4ba2ac9699a2.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 0x7b1e582982658d43122070b5fdd0dfddbfa277b56a0105c356047ae0b3f7fc48. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TR0321000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e35cc6fb826a894449057ca0b1c1ddc341ce1cc8ef30a83712f7ee8dab1585c. 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/FR6V82350896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952c6311ead94ac39191394eba0de5805759d659fb19ea3a4a522da16c59482. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TR3731900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0b36923c9c774e1993104231f3a4944ab664b9a3ef81f402c2a16c4fda5eb3. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:07:38Z), 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/TR3731300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf1ba1cc4332befe6910654aaa05edda9ecf6623be9193afeb3596e3e255eae. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TR3731300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059120232e9fc841a40e66e2af8b7ba38f7de8c5b1a12e66e09a8a64dadbf57e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TR3731300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b578d07f83ed3a681c40ae87301da4014478df12eedbf859fd93b4cf8d7345d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR3731300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd11a81cdd3d39c1d1db70892d35b9780cfcc542ae1fa92188c9a675b4b17ed. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES52283179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93e2ad689142ee42ab5bd9cb4863eec6a3718ab89ab0438db8af816add3e23. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES52279667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc15a6a41cec6b3a815b0cd5db5412011e6d9b0bb756aff138824fa1982ac268. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES52279668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b9e63d8d00e88e18352b963a850da78b3dda2232488e273898e825f58d3591. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES62235237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aa30561865edf31754345702f4d8f74dc963d2be08e4b40164611ad839e4da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES62254963.