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 0x7ae7bab796d243baf8dee3b5f95742ced6f4c2f55c972519f1de44ca2ac67ea7. 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/078d00b3-c2ed-43e3-ad58-4afe8fdce4fe.json and https://artists.proofprofile.net/proofs/artist/078d00b3-c2ed-43e3-ad58-4afe8fdce4fe.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 0x0544c4aebc222f0fd52c8f057202429d69af956cc438bdcbef7243e5d0e435f6. 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/QMLD61407972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db123814616deabd44300249c674bef4b9d139da40223568398da70f89f97c9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QMLD61407974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be8ffcd014ce9e7c169ea241f80332b84112bbffb0c067eb634e7b4ce2f6884. 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/QMLD61407975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe7e4839edbb8e54ee62d619a85d6689e8cb1b1fd560ad26bc902bed8ec3989. 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/QMLD61407976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd7ad8e5b8e2fcbd60ab2c15174103252072cd9c474a4161c279f2fdd73ec0. 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/QMLD61407973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59f077e09730de3dcf29f64540b4271f27e9ca7c41c10d089f3a19468f9cd80. 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/QMLD61407977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9916f6788f4e80de1bb4dac6c52b7e2d62ce8e75759ad567ae1de4b66760d029. 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/QMLD61407978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78afbe3f7684e29250d61a62f7ed234683e658806890d3ec857226a1961853b8. 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/QMLD61407979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fca74ae441c6409be690c253f9c30af50a31dfd8b31a72d29df3d8375b6f8a7. 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/QMLD61407980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16de3e7c7e985ee8ab60dcf7883ddba1cd7169d71ed39c493c0f1925e517f09d. 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/QMLD61407981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d9a899aeacaab552e1c398376b8c9036b7158d9c81743b7e786d3e2b609a33. 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/QMLD61407982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0103fba45524cf9fd8141049017c16cdfaf5dcd54e61299d244ecc5698af507. 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/QMLD61407983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8d132b3b6d9ae69afad7a609c1f7b6716c1a26d2406c60b3e0e3c5eb3b038. 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/QMLD61407984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c51383cd448e3809cd97dd815f0a9692ca165ca88cb96b11841e5073574acd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMLD61407985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206aa852537dde23aade4aa8b14e2040350663c98f4d7bdebad9f3086140087a. 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/USA2P1940638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2161049b3c07ef62dc4b6f0c72b85507cb73ffbf12790a777e22eae83dd6a22. 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/USA2P1940639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebbf7cf14ee37c07c61d19bbf828bdb29511281d2f1d344df1cac7add8de6a5. 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/USA2P1935376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8f3d199e1547b5ff82e0a5357bad2184123686973050f2758b5dd3f182719d. 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/USA2P1940640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c3f5626fe5ce8b4a4ac57cc2549dc764fbe2952c4729ef2aadf6dbfa68863. 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/USA2P1940641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba25cc01517c89ef364326312fbfa105e657a6142087c0bb8f34e945ea96aef. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USA2P1940642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1255d7e15593f6c195a658665358f332eb96291dbe31b256194f157d447a45. 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/USA2P1940643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf73cb0713e9c65e5d8ebed2d55099d100f30aeb60cf1082ec64b4a1a95f50d8. 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/QZWFM2410619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84731d9545c74ea6fadbb4ab0dbd0e3edde8ea90ee96760614af834303a61dd6. 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/QZWFM2410620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1d9ec4dc8ca020de7d9047b48da3bdfb6df33b723edefb19840f109964f21b. 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/QZWFM2410621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4de335b72e1499c9982357b73c241144bac546acec4b633d132bcf14462e01. 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/QZWFM2410622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65606b789fe3d37068c204c0fee6e975ec4ef3e62d33e6742f013454915e904. 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/QZWFR2404723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7079195f2cf6ab3085eb83174bf6502cbbbbb78f89bf013af5e66aff10db6170. 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/QZWFR2404724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb1b73c8716641e500299d0cecb8bd5cc17211d77681af27dcab466f371543f. 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/QZWFR2404725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8847913177b469b29f0549b92e9d48c096307569142eb7e2be40c22b701209. 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/QZWFR2404726.