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 0x3b8e47444185216fbedc89a858ddc6c9da53c2f970a3ac0e192253b0454d243f. 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/d2a8c882-0715-4937-a8b3-db1ff2e36cf0.json and https://artists.proofprofile.net/proofs/artist/d2a8c882-0715-4937-a8b3-db1ff2e36cf0.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 0x9bc16de50262fd52ca7ba31cc8f39114e8facd78a9d36b09787be92d793ce3c8. 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/QZHZ41989953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb410714e3d125b2a32f02b056a8efe3ef38edfa8c3016663f24494fccd5bae85. 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/QZNJX2419612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388bac80321fd3634f2c50d12536c121ce1e9bbed75905e1b536f506849c1dac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2433636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed9f60b5050216ab091edfbf668897b35ee7d1fd06ac2f01da357af3053433. 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/QZ5AB1833055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd905d4cc2daba1e71b3dd77a439b4f61a5271abadac530ff7cdceeecfe14776d. 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/QZ5AB1833056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc306d597115318692f4ab9ef592bc3726d11365a2f19609baa3232a44f17002. 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/QZ5AB1833057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b8be8ce457180f1027c19f4c9326344a8f28948bb8dba99a5f9ce176e78db2. 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/QZ5AB1833058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf849b887be2831610bd5920ea161e23658bf2190b79402fe2ec4ffc4405fcf5d. 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/QZ5AB1833059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e62ed3b6475b4a3730d9321fb53b514b23f863b9fbbe6f3fa71f2116c03600f. 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/QZ5AB1833060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e97912e880dd58670eff8b48828fe242ad10674b53748d83915f5dd833d690. 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/QZ5AB1833061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756c4242bc63c60f8a61655558d08923cf6017d1fbf9d43eaf64ddc8ac918bbb. 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/QZ5AB1833062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fdc36f44cfdf5884e125a8deeb8beac482dd251c81fd4e715decc62d0d8eb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1833063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5476ffdeb61f9a3f561f009e4f59a72fa12eef561a140e5cc9331d1b261554d7. 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/QZ5AB1833064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62fea5142a4acd1a89a1b59e888bdc95c943a09987a9fdb3d256abba3f1e319. 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/QZ5AB1833065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3840e27e44e35d7a7ffa6f66ed523d9c7c8217eacbf0fa9ecd4d0fb94ef6928a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1833066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec369cc1861ad98882cd7398e87bbe699166b172738d343452ff41c59eef58fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1833067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c424ad0cb9fa79eb42666b0c71d72e7b9c2eacb6eca014952caaca5dddb28d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ41945937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefb9497172b5123c483103b7d260f6b9c15a051298cfa45db88d90045d28087. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHZ41989948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea18179c2666b90984ed94aeb240a24f5041a32fe69aa86a4ff592f0d9c45c49. 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/QZHZ41989951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd30cd38b3224e60cdaefc5f504546d1152cad74b66dfcd958488457d86bd54. 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/QZHZ31976007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc16de50262fd52ca7ba31cc8f39114e8facd78a9d36b09787be92d793ce3c8. 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/QZHZ41989953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2b4fc5d2267738d9169217b62f792f2a846d37c70edf21cc3533a545009de8. 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/US6YF1800115.