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 0xc79d49e80337bd0fcf53bb97017aa996ef4b603c1181181fd24293855cf5db2c. 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/b3d5b262-8c56-4eb6-b3a3-4c325e479879.json and https://artists.proofprofile.net/proofs/artist/b3d5b262-8c56-4eb6-b3a3-4c325e479879.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 0x4248e2090a05753051cb17d54b66925fc6fc286e7dd724c87246a268afccd81f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:50Z), 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/TCAHD2389330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231bf7f8876bea1f30b404cb1350ee48927667a1d9d653eae54be4be3cbb1869. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAHD2389363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224fbb82150fb960664eaf6b6354f3b1189176a9155c6695e1b0df91e601703c. 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/TCAHD2389383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73a5e502780887b134c762ec56cc1c461ec629dcd281f01acba607872fa8ee3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHD2389403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a43c46be0a083151bbf21cf16842c8204934d369d86bf7e26ad85f06dbacb04. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:03Z), 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/TCAHD2389442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fecfd6143c5b7bf75ac49f62b041e59a42a16c85a88814241f50a6e3629cb53. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHD2389450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3acf1f5650ba1bc5e6f6b109607d0c3a6eb08f2a4697f53713802a99f72309. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHD2389465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f8a832dd1fc6f4a5fefa5e8dde5422377e8e50d407c69679f758d96e21cb58. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAHD2389518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe221957c4de712c7d0dcae06b4b5cb0dc7cec64e8340afe0e4f93178208dc782. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIM2440173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992d8a033c635f4ea9f7cba75ead0798869d7fd8aee17363758cbe83e273436. 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/TCAIM2440185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9269671aefd7943a918c991a0c7a97dbb5e2867664473f2c7fb2e49698245. 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/TCAIM2440202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5562400083f7c3f60443fac0e736f9e0de86140838940e8100577220203a4731. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIM2440405.