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 0x7c50ac97c4200ed66b65f41abc94ca3ade1c873bbfec2c5d0fd9c078968355ba. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc48c08a-481f-41d7-a3d5-6369fb2933e8.json and https://artists.proofprofile.net/proofs/artist/dc48c08a-481f-41d7-a3d5-6369fb2933e8.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 0x293119c211c135904d0f63e52ac769cd00ac718832439afec5649b709d57c498. 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/SE6N62100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e1e0c8d9063dabc96f1156d375a577d565ea656bd1d0c4ee025cd70a524a64. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE6N62100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc7bbf464080a8ef5f778e4576efd88ccf7a2873481edad45c9784d62a5edc. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/SE6N62100147.
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 0xa320870458905bb729ed24f274a471dfd347a9b90025128683a3e0a6be9c722f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE6N62100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbde49b06f9154ad6aad7ea5631265d2142a2eebd3c1589b24072fadbb54d0ca. 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/SE5Q52101819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a4d2b21543de3530ae75a443a50ff1f198677d4df513a5fe42dd5c3a9c781. 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/SE5Q52101453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5f69afdc70d85b9d38eed3dca95bc66fe4b46e7fb9978b9175c841270cac3. 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/SE5Q52101817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912fc77fbe500975c64838756a447b7da4d0f790a7c4e683703235bf14a7ed18. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE5Q52101770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3838c1d67cc3a93cb46457de1a329a4390354e81f5f5a784a33278128ac8a035. 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/SE5Q52101820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcbc06a863e0fd15a5d779aa5d92ecb5543f7a2300c722724beec3060bd8054. 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/SE5Q52101423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa219c138399b7bd1bc1701a43c1fb84b6d8be5a74da9c83635e7d4165c6bfd8. 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/SE5Q52101830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b643074cbf74d467bf14891f8d1efc38d9dac37aefb3b3174a9681df3b6e6a. 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/SE5Q52101406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd521901d530ae5d8ce45e74f2ca379cdb2da989de1100785b995ab1333c4ff9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE5Q52101466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3de3b4b78f5312b134f22a595eece664a5aeac5966b4b143c450029a5cef4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE5Q52002410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f9951f0f5c2e2e887567e0dc431895cf4d501229c443e9860b3b3d7b108ac. 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/SE5Q52002409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf7b247fdd307ed5d08ec781813f2b4f1ad156549b9076c5bf838ebc3a13673. 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/SE5Q52002391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a21f72dc33a227bb1a16b8f0c103f5743038786e50b3aeafd78f220e483a61. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5Q52002394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cf68e4d29cb8946bdfe2e6500100fab24e15f6e7c40753586ab53e91e5b55d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE5Q52002392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8720f0a882df00ab45c21eaf0fcdf9aad2ffaace5728fd4f0cb5ec81b99aacdc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE5Q52002402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6c6b046271b0ecafdfe702bd9e2f9d076d8980a39bd10db2ca1677100a98d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5Q52001509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07fbda2e58bf577961a69b9b3defa9ea7dbfa268f20cce0963a3126ed10f7bc. 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/SE5Q52001510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201e3d6614d3c482f55693a71f4e5a696925b76266d8b075c0870ba3d2225656. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE5Q52001514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a54d50d241ddaab67facc62705a0dd036c608e7a9f0675ccd37bb0fbcb90c0b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:27:49Z), 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/SE5Q52001558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa026c5f4b8885136728801c0a566c9365d0bbdbe3ee517435b589fbb2a449fee. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE5Q52001484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92475b0343edd5ee2c7d4eb4a80f60364eff741769e77a0da8a286af0b79cd33. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SE5Q52001507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25b9e44ea21c453fee30f90ae9c5029502a225352cce83f54478d3c2c42f0a3. 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/SE5Q52001491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6938acc103e2d50dccbbb91d3c661e3ebab2b0d7785121384bba87d832944ab. 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/SE5Q52001529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efac0a2181d72053fee23186e9d9e887a455a5020d845ba130cb741646b24b6. 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/SE5Q52001512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4af2665d1496aef1ab590e742f100b85ede18c377ef917d49813690a49d7aae. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SE5Q52001517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a59850a8547d148d101fe6e203e0ebb62848adfb675dfe63bc6ea27b44fdb1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE5Q52001495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020e961d1987b7bea054beba7e55970aa050047d05fe13e446ad289e8c05ea7c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/SE5Q52001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c9c7dd19232b549c7b354bbfa4215f75fa76fb66f7f8244de72701df885bdf. 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/SE5Q52102202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df34d16db9811e4ed314e2bc61bb8a120b1a4f3ab863325792d131cbf4a89f9. 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/SE5Q52102237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c003be78b1c533cf97d4fa0a84d2e7c29add5d70cceb636912135e2175f80b. 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/SE5Q52102046.