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 0x1e24c1315a44ae0da811d8bdfea6f106af28e43f0ce82bc767079b295d29dbf4. 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/61da4d4c-cfac-4694-99db-9d2c5729d0e1.json and https://artists.proofprofile.net/proofs/artist/61da4d4c-cfac-4694-99db-9d2c5729d0e1.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 0xb3b55fad2878f5901d07a52c869dc61f5ea6bc61307d79c8ff8ce0a16563b71b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNC1905564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f1accd552b7cc37a8a831143956e229dd7a2d79a72485f217b385e87598c8a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC1905565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcad53de433bc744d46f9707df26faf762e593e43abfca480511c0d83f53c25. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHNC1905566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe50796d0848b98adb961c5b69b0a5b89edcc1185bac99ea4278b938ad0a3a6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZHNC1905567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfda5e7d22a9866aad974c042dc4879377d3b6ec598dfd6fc9b92dd37129654d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZHNC1905570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fb552aaee6b961d9826cb88c1362370f74023d5102110b4b57487960ef4775. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHNC1905571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2615dd9c02b454e39ad0c07af0e67e3190ace04dfa86ad4db38f201c11aecf. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZHNC1905572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2d8ec6a1952f33362f75db8b7305c47ac442f0c7bfbfa3837a4767dd79314c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZDA72008137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a4027f7c1f3437b43d50ea564d552b33c371344c67ca4c09310ef98681663. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZDA72075044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c7587c158fa7eae4fa6afd03bc6de79ee134fca0b372d07ef76e137e73a3c9. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ62159235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2084ae40a0892f54720057780983bb9440016cfa85282563d135966b4d2b50. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWR2367815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55de02b0775a4f44834352fff08c58f053a3908b915bcaec7cba8444c725d5d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZTBD2361369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf340b30e5758f8fbf60b2d3b054be01552568fcc740a0f8554ace15296c80b6b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES52455314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13f531c70dabd7bb2543e24ab45ac75f0a54254729c362bb5aebc322b2c88d. 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/QZHN32482748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a436b39de1c05baf8082719ead9d34a9c78e48af40369bf10861b8f388d2e0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZHN82495375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fd0d8411bc3874455e3fba255b61b06a797f00fa7d629013a9f2146acc3cb6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZMEM2438476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa8e5b5ab451423dfc9d04b096becfd47e31ea578fbb31030a9a924800822f1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEN2476783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510983414436c661c2d0692d5c22e053907da2b4b7172bd7468db47be9a9391. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZWFQ2426159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091bfab931547d93f9dbccb71d1c46769765d8f768b7fb8dd9a5d10b6f9805d8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZWFS2442725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6b3f2e3739797fe48a6fb221bcfb9d24abee69dff68e26b3f60f38ab05ca63. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFS2421934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5540a2186f33a5aa43d2b640bc789ddc40ba86d5ee4be4cd85e05d62f174c8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZES62568657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed3528ec0292a0f800a7c8a3149df83d48190510876d9b5503a36c50a647616. 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/QT3EY2589499.