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 0x8f6b0e639fb82e3308762153538ec3c61a9a8680bda959a7a79f32a12734088b. 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/32111330-3d3d-4a2a-a00f-017d06c05327.json and https://artists.proofprofile.net/proofs/artist/32111330-3d3d-4a2a-a00f-017d06c05327.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 0x1528df8ded14b9386dd265bb0494fd359728d174df5a35ebdbbbfc882c0bd3ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:28Z), 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/TCACF1510732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86b27959c256a8fa15b5a048dfa85007914d5c96c7c5bc2d9dde2c3d551b57b. 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/TCACF1510740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2192e82c76389a73c7754da3d1217d3c67ba98c7a9434b6e285722bfe6065bf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACF1510742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4593642d8934ce66fe709b2cc2106f436e9b06125f71f1c7f61744aa0aa928a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:27:12Z), 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/TCACF1510744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d61e14faed0928e8aec2d997b8cbdc0fb378522e0f7bd594f80a676b2dd7895. 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/TCACS1613123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b877e60f86914ea5b5284c6caae96b8be8396d958c94b09503dab1eaeb893e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCACS1613125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2ac616942afe920d096fbc0e1ff5f05dec405e94cf1fd788719dddbc7c8728. 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/TCACS1613126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f12b2ffc368badad21d44337ab8fc546d96df3748c6b9acfcf690029880f302. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCACS1613127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92d4f03d53ec5a531dbab0d5c260d0bacab36de0202f7952f9b34eaa8e62850. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACS1613128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88c7a628be62b1c2e1d4bdcaabcfb7f7aec9cfc2e8406ead622f180cf8f2f8b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:05Z), 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/TCACS1613129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbdffc85160b105958b128ded685d781efd68ae0dcba3c1e00d8c5df0f821da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACS1613130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50005dc9dfff6f17a876db48da793ad6ed05b8c22435f00fd02b301424e9b37. 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/TCACS1613132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6f48928db69e89f2fdc81b49093d395a07118451fbc09a1c9e29279d18cd6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACS1613134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73d71cfe4fbcb1f433cda694fdc8f5f080d918e1a3ee7075d99842f9f50590d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADZ1887563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e9760373a671d35f5be4a69242e4fd830704cdf04373ab804ba0e6276dc95e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEB1993281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13421a2db6fab4e19cc44ce1ea3d571e095a69a18c2d66cdeb611fdd45edad11. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAEB1993309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e36ae8a0eefa26ce29aa65f6b0d39ba6a5498809025a6d56b884e27155646. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAEB1993311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48505908193bebe0d4fe73d2761da972122bf5afa2f235b8a32e22ba46db3053. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAEB1993931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd286124787674dd579c0756f5b66795122bb4674a513cf208541e2bb0398011c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEB1993939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df3e5b22627f1e40d143ef527ab967c315f651788fd14b9d63e5739fae9d45. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:47Z), 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/TCAEB1993958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb010e543c53296d8a35a722b522270e11b9a4dc6993d82fb2bf12d2a31b33ef2. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/TCAGD2207833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe784a2ebcb1b4f88679a2163cbe5493a04b827b499fcb492f9d6190e84798698. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:21Z), 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/TCAGT2394243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ed1ac955f7ccb0b09085aebaf11d6b611e4de982d8a301df69d8105259a9f9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAIO2432222.