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 0x6f2eda872f91548f72ff758335e791a87b52004ea2f78e2a686132cf3507c313. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b5b2715-f08c-48d2-9860-99b3b5b42252.json and https://artists.proofprofile.net/proofs/artist/3b5b2715-f08c-48d2-9860-99b3b5b42252.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 0x40fd962882400032fd4f8fb180057070c3f43b20c77d7c0a7530560f26d9c952. 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/USA5R0921001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541b8b0c8f9b4ebcb972017602ec4252052e884ad10e409d8cde5b9d2f8519cb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA5R0921003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef355ea36109be450f3eab27fa0bd03ca4a45490e3bba0d1e8988b4ba89b21. 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/USA5R0921005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dbfc380a5b2856c689f59bcf77205cb194d8393c4bb4540862f33c492f1312. 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/USA5R0921006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4d0d266e1caab7a6339e7d88433ef908d34392aa1fcca7ee05ce305ea1b68d. 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/USA5R0921012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f85cbe53191ec97529598da4a8b57f41023254338424f8dc1463961334e91. 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/USA5R0507101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338259172b95f69901daa00edaea058a9439eb5fae3336e8e2b717f5ac156df0. 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/USA5R0507102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5496a5871fd3e07f1ed47edb5352a586adb3ce3ac00ac21a704a39c642d01bd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA5R0507103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e54a953e562c771a6e588744f6b0e4c6cf110a607b091e5eed3a6b108672d1. 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/USA5R0507104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9038c37c3eba9b8197b96edae13c66a78166ef506319815062d03d81c7ff264. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USA5R0507105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1824663f0b94127813a6371304c19bf7a682262d5f0d8bcd3f9cdd0b3adc9047. 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/USA5R0507106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57a9a0998d5e04c53f3cf8300c562ccb21511ffe62032bd1bd1978aef2ff830. 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/USA5R0507107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1cdc47a08e044e5f6e99a716898e2314e941267c75a783bb2494c3951068c7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA5R0507109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeeadbbd70b63d63f924026db71f4e9a81b603ca197460073077ca89db9ee89. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA5R0507110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eaafac22f3f721846de595a81d54e98e478329507f2d71ede47655424be25d. 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/USA5R0606706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b126bcd68daad21a396b9319a67ed8bbcc42e1eabb452c741bd4869d06bbe. 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/USA5R0507301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cbf1082f173bb4e8af6fd06ce7f0f1bb78e504d119e620e659bd200c35017d. 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/USA5R0507302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ea7742e69017c0a06d61b91525c8764957ea7d4024af3cba8b04598ea63359. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA5R0507303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab71bc138ff4274a0eb3dae3cfc19c18aeb069a48836c69d903efd363d53033. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA5R0507304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3111bf17ac1598433bd656815862df1532bc146d312af886b10cb0c239c9f643. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USA5R0507305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f26d6a5b706d45e0fb8c8bdf67f3dce8ff81f74a3034d8d4bb811c171c8f37. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA5R0507307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b606fe021a996f18cf3d2d6439478c2d81a2a84b0b0810cd1fb7657d4467ae4. 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/USA5R0507308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704f26100cc60df1a867e37f5be0d57c203cad1d324b896341e484510bac1b94. 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/USA5R0507309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a4433e58025c68aafaca45b48ff87058aa76bbb27ad7448398c304f216d51c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA5R0507310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90577afd02ae35e4fad9606c419857b206ea85a85c48c21e020cdf8cc92d70a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA5R0507313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c089e230f0b60149deec90ebd1d8d5f5cb9332d9b259ad323dc54b979f156d. 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/USA5R0507314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5215782b0c9416b05a98b44d5e3df4da33c8d03c3ad1b37931a5e308b663dc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USA5R0506817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55391e26387303a086b5d9fad9d963c3dddadc17c6f0af4271a3b664a8398c0c. 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/USA5R0506802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aabe406de6a67d9d1acc47183c8047930483ea04cb5908be834881ffcf6eeef. 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/USA5R0506821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bdbbf3e67b8ca225bc5e41f71289e4bf3911e93ffe5c9d55ecdde49ef23e81. 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/USA5R0507410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697c9f9da42e486d8ce4647a8a4f8ac023925d5f26455811fa3dab7e3d5c717c. 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/USA5R0507411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb93b257efb6ee2b7c1bf6cc56f8ab713350231c96ba96f82e96273d5766297e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USA5R0600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf688c815ed4938c6c607905362273a955a8cad649727157987408f052e9d6c6. 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/USA5R0600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d866188089f0caeb4c38c86d219e338dbccf77f5ceb8d981ed8ac9f7b72cb8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA5R0600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f5516427d0edc3eb1910095a3c8f19ca0fb812c1a55c8b2e782bf50b7cc0e2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA5R0600107.
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