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 0xdd009b9fdee9526e17c89192533a9bfed61a524911e89360b51b69bc46c990ee. 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/ccca29e1-bc79-465b-b8d1-0546845ddab8.json and https://artists.proofprofile.net/proofs/artist/ccca29e1-bc79-465b-b8d1-0546845ddab8.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 0x00e620cfc58b58871b1acb454474e1456140d2e16629cdb3df4c1d598c820210. 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/TWDL72401623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aab3886f75413a520a56792fab9b844b4d992e71996d736f2ec1620ccfe5281. 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/TWDL72401624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031d203249ecd60da0d1b9f17f76e0445e75cb02e2d7b1a9e63cb25cb7edbe7a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/HKE022200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb3c74281f9d10d7efc30764c3315db88458fc2341b0774750e364fbb2a438. 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/TWDL72203340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d892aeade2754e3d676c0ce449e97305f7f13596b0eca515019978a03796c36. 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/CNZ502200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1055a044599e08d2e1b12d136513a5336eebe3db740d3c6658ddf77f042c46. 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/TWU712004410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc535bbcc415ddb6669f0c28741e9027d11be3dbcd5d3ae283e2358f8cea8d6b. 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/TWU712004411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2bf8fd7857610e00c3cd6fc621897cc89483f326f65b85231967fe964892f5. 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/HKE022228376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a08b6693ec456efa89b525022eaf96d00cf5e5bc36414521bf321440ba4670f. 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/CNZ171900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb0748c2e8be7617d6808b7e0be369ab9149ffa45cdf6f3f0e37386a72b9541. 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/CNZ842200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbe80d35f1fbdd35ca167fd464313db37c6aeec8ae957a3e83341aa4e0187f8. 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/CNZ842200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5dcf436521bc5e00657c9d3c1df15dfd59f3984151b7492e27ff2f14b3d8c. 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/HKG732102459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed458bc27c145ab2e54667f153bec0e86c81ec01183199b684b73941635da6f3. 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/HKG732105031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032ccaaa16418e34e15dac5c260f3c485b85179f4efa1ac85e0f48ba82dc6685. 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/HKG732102844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fae4a42ef2602719d50e185171fe386bb43623feade2645498398c4addf0ba. 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/HKG732105024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5253e97f756f4eeeda7d4d46dab95bad4dfb82fdd3d68f05ea152782d67eced3. 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/HKC372479797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e409856dc2c1fae0b2499ef84afcb607b1fccff8cdbde0dddb812524570ad44. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/HKG732103135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc9fe5dd9c9c145a83b1c9c5b44e469ba478e432b69de6891aa0608aa513ea. 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/HKG732102458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a60eac91225e5f3bdc605a8a93105a5ebd25a1172b569a79a9a813dc28aeeea. 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/HKC372479805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f2f49339b67f923cd0397af043d29927af44807a19d75f23c069865fba18a. 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/HKG732102500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b7dca00c26b24428ece8a6a3386808006d3d2a8fadfc62bd05bc7577639074. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HKC372479804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f457d049fd19a1b83b717310e7adff8a105d985e56ea28c8a8b68cf873a7e. 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/HKG732102838.