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 0x38f3dc487910bf2376ca46ddf8125dc88e3af758967514b4fe2959dee4cb3e5c. 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/da61685d-fabd-4375-82cc-260f3ee9bd9c.json and https://artists.proofprofile.net/proofs/artist/da61685d-fabd-4375-82cc-260f3ee9bd9c.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 0x8ed212b58f394532685fc737efd592508a3f11b6c9f27950beb2b29d460a2bd6. 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/TRANV1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20206bf75f189d479ffef799c0874db01ffc5b1e86a269934bd7e2a893e31c1e. 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/TRANV1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd6e9a98013a837795cd4d0d3b9fc23a2a0d9f54f4316de8fd76311d12b8c8. 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/TRANV1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b47bc953dcc593d9901dd0d0f00e0e6183117450cafb085e7102578f9a75c6. 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/TRANV1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cc18de423633ffc1b9e60116f5436842210fd5e97be89c45dc37f539a6f763. 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/TRANV1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30e5e6588152d6a1df990d5423030705d8ab7cc95301e0205f4a7b7e7de6c2. 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/TRANV1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe237c1c42e0d24b6e4b3465993c57c64526d1b656c7d4727dbf640e92732f7fe. 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/TRANV1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac241fed66d8a6b40b1d599dd28a153a1745d91a8a1c61135faadde84013f6. 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/TR0330605244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ad7b2d63cafd3f21f9d57ccbc858568d4c46470b52c5f28fe47200508fe95a. 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/TR0330605238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08356b1c9e428ea7953fbf85c6901ed9f92ee27b8b540499eeaf7c0cb3dd7ba8. 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/TR0330605233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedbfa49c1e1135ff0027823e93438f692fc30fe280573a5419b7d13e81dc615. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/TR0330605230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4a81fbd6050bb7de31db44e044e93cc62ae1c60f0f061fc11aad7219750983. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TR0330605243.
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 0xa29134d88a58f089c8f041e83ae5f1b7feac8f8bad86a5a3e4fca0ec342c4dc5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TR0330605242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280d40397baf7b9787278b9072bf7239ab35bd020ed165a57470ba1c744ca504. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TR0330605241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84161aa9ea62f1b8b1abfe4075661d97150da871f1c94f5fd7d5b43188f9d86. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TR0330605240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff651ea400ae5838b0b837ea83859a6f0d70e39c63e2ea2468524e5dec032673. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TR0330605239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c0305bda82e24613feae354c84c6e804ea2108c2185d7d64924dfbd857e1b4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TR0330605237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f827008f5a7d3b6755abe3580a64aa4c783d074ba917ed2d3b765a1e19d72ca. 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/TR0330605236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e42aaa7ec92633c5cbade094a8b312e2def22ecd77e06b7885d766e5e0f9c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR0330605235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165a19e888262a52b55f22986fe025981d121649d1d938c210de0d19104a154. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TR0330605234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1648d9456783e542ddc67f4ca958bc376fa3bb5852c3a25f3d0a0e0587ba2979. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TR0330605232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a023e6725c04777030264f41cadda3a29eeb37fe734114cb4ce00ecbb06ef40. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TR0330605231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a01eb8e2720e84be8ea1ecc2872abfca75ec622c2aa24a64f0d2ca93ca5c98. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TR3431100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2444433f06843c8c5a925aa9345b8a3ec1e4db6260361ae283e2da98bfeed6. 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/CA3WU1100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb227e0e9b1a6562ffb477f52c96e80d90964efe7ada386ceed4f1b9a34370597. 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/TR3430900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b75aa4911768811941c7f5a497ef5c4aeda71a3844d00e6dfd49743ed67aaf8. 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/TR2371800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d10c8c2605cf642249279afdd73c00492a9413c7af91b0fe344a3819e7a73. 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/TR2371800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db030b6aaf148a733c17356dce7934d9fcc7e04ddfd59f22cb550105bca021f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR3431600997.