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 0x009494bfcb116120e87071653826c24ca952e783eb7f41eaabf1fa898547ac02. 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/779111ac-f003-44f7-a471-02cbefe6e659.json and https://artists.proofprofile.net/proofs/artist/779111ac-f003-44f7-a471-02cbefe6e659.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 0x11b336369dd29beb4e7359cf9fce55cb3ef3d65a4bf3084c8cbdc89cf26e69dc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CH6541888015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b93c0d5a8271425897aad6238596cb967aa527ee3a78ee8743a23ad3791dcf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6541887960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4926161cc569cf816a38e171603e64e4581d63120c0119f55a2fb0c92abe7a77. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6P42587702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284cfea474d993c4c0b0c471f0a1d2cb7f982c5d7635fa60f412c7bce61a3b1. 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/QM6P42587704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784443855c555ce278aae6e9d6f7307dab8ee70aa64c0b4b5340f69d84c96536. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CH6541887952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad88395a474c177331bf2257350f8750d68f595cbb084fb6cc3c24189a6df2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CH6541888019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8847019781aa280034c155825e2dcf31d95922f836af88acd3eef2c146b44015. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH6541887997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b55935072eac5c6088b912dde734c030712f77f413134c443cc25b1e87f390. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42587292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cd20cb929f4625c01ec69dea50d7166d2ac5f45d814454fb038ee55509e52b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM6P42587297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91edc18e2213226d5d63857a256ec1bc3d51c1d85df1b424b47fd95d0d6a298. 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/QM6P42587293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a29928e3ba4e1ea047d1b9c8988fe989b399ab7be6bcfd9dcb41e2cc9ccf5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541887956.
Popurrí de Cumbias: A Sarita Colonia / Tu Corazón y el Mio / Si Me Quieres / Siéntelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c1668fbae2d4d265d3a9e2c487ffaa44114812c414d589774ea1e801b10e77. 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/QM7282091287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045c3f62ea956b850ad18d6811d7cee8b51c91b9083af1108bbf6b85650499a2. 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/QM6P42593835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534edb2a425916cb1e24ba0de643b739aabfdb73f4570796b023631fd03d90ed. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CH6541888043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff0458046261b12da86e704c53f445619a487c867696986ba5b06f29602eb9d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM7282503838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec7506d4927d761cabf6946079ab4c18639a959c88f4cb20265082d5074d84. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CH6541888014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf030386045d1226c2d05027a0cc38af7ef32cdc44c3539da266adc4f01707fd. 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/CH6541888090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212866df04a12f3df372e8dd30f962ab45e9951a62c2df59f90c94ea030e510b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/CH6541888055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514e9292d9427bef43e18517fd2759b12bf3c84df4730beae53386e213c65c22. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM7282557630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf17ed5010a1f992b107c70f039558968cbbf2210f06f12a994b4d0f2696a999. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CH6541888012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7266a92f7c467d601093d706bb72f9cc70258f69843d1846c389c9dd206885d7. 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/CH6541888020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc96b5b53dff07a6099aa2bf88334a8b6fe3a1448139bfdf596491f0ce93f395. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6541776901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dbbae9f1c2ed9c08459be77a3af65d00cb5024d012f00fe4cdaedbd5e8da5d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM7282557757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd8fd1e84a87b1f2e2b9ec493306ff22273f34905db87a934c1a5626af91d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541888029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08906f8c2025594977089f971b567e2dc70b1b98dfad963c163e0e9c4401044c. 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/CH6541776882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad611e0b7c60de3cd2f9df000f2ce58d6b3291f5c58d1ce284a53a28db7fa0b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH6541888023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7c9d4e74bdc7e380adf17a84bb497137a1b424280ff532ae8c5b17cdc2ce5. 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/QM7282560086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe003d8bbc14d98a3c4ad83d184778a8db4d56a8d9ba3a28cc68352b7f83808. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH6541776895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5078f93391f6aa16704219d28dbe6e0c28d60c55d2286f06054f05c53ad64e7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM6N22493200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d3679fcd1851c86be8d8513b1276c9e103e1145d0e4077a3a0153cb3c145df. 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/CH6541887988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d47878a01bd0c3bec04a56d8fd8eed1cfacb9046bdd06a70dc4d16a593e87ad. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM7282560261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf4518450833461069ddae5e4e95b89af6e2e9bad777b66cbda22317254a4d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TW2417321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525834fdd67748ae69f638de32ed7204c22c3f00a45657a2891aa1be7da05f25. 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/QMBZ92568458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4e52a9ba237403feb645aae36341d58a055a14343586638a2ac0940ee1290. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM7282464623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa2507ac2fb3f4b4372973617081351d6be9dd73607116399d5dc3a331aa22. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMDA72517296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34586a29ad7ed5ebb533189145e4af1a707240b7cf351f465a704c7cbdba52f0. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/QMBZ92565012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51405a149d9fa7d97d6487f0a651b0b72c522d1bbc9a55236cd7ebe566fdc7d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM7282585358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4152c55c9f4f4cf9cd33177a0d62ced4256924ec92f20b817a1c717031acd22e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QMBZ92586721.