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 0x201247f5209aa1d6f76b01eec37bcd0accf4dc8f1d4824f335af9cc3d2b45a2e. 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/3e043835-ac6c-4fdd-a184-c63c7dfe8abb.json and https://artists.proofprofile.net/proofs/artist/3e043835-ac6c-4fdd-a184-c63c7dfe8abb.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 0xdaea725737fc3c2b519142ba826dc82dd4af5c37505e90db6c7740e7a1b1f24a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/UKXN22422099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17d623adfc0148beaec9680012247afd3c8327ccabc40cf2518ff4a33f3712f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/UKXN22422100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94679c49272b3d350e78ef70c8dbead7a27d8cb93c8cf4feb2bd14281de5adb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22422101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495199ea6b65d23f1e804afefa6666b925d4042ac5d3c2019e60d8451c097390. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22422102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b95ac862492030d17e12743c0271aac339fc305e3e80ac14dab477de4ac5a8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22422103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d70f5246d5c7379f854d3abb4a2bca1ab04dbd3391b790d295f63ba036f26. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/UKXN22422104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f3ba9bcc99bcf8dd89899b7fcb51e6d33a5c936b644ed5862ef5bb5e68c617. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22422107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ec92d37bd120aec065d3947c7f346ca0b2fb1b567af6b32770d0f8fb1e7656. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAHQJ2465617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d8b60301e23c8b584d41d475166a278aa5c8484e570fdd85289724dd61342. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAHQJ2454847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42310e55693337ff7c9729c3ffe4896c193e225e1d7e68ffdbe499083ae7e4a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22444924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45896193042cda9083c066e8318badd54dcc82624bba0332a1c2db2b3d61642a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22444925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7b3e488e9db9e2d666aa1da916503e0b7bc7f58f203f00b1feb86f4f8fe4bc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAHQJ2454848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c036ced0cac1efcf7cfeefcb3b068fb02b53ff4701868127b6425705d710377. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22444926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2905be339ef5c2f20ceff16c2e0edb47e487c1d5aa2396ae59f16c809c7e53cf. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22444927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adf8afecc808f05685e9ee7d8e5108079da92129fdc3f351fa56563c68e8598. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22444928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bc1198f94899da28e513777bc21c38513c68595bca1fc87c95979965d1a08c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22444929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b12d280547f6a5a74a2d90c140ba912da944841b00af3eb7925b6ef6b5628ab. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de461b7b0254c769728200d12c916ec4e98f39e1a209dd05e65c4dd58a8100d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706ca7802613d2faa466db4545b89717f0633f2a13c524cecaf8cc6342f1f2a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d97c642ab253bf6d727f136c9de733a77cb9f75d4154b5983fddc7171a77c2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6111ca5a6ff80e922d8dd55cf1a3e2e9b6994bead89eb9af78d48e31c1ed1e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a319dbb914d5d5952d6e155e372743ac313fe68b98b95c7daa3ca09dfee657a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead1190394e6173af76aeb79241c833878d566f6f3e6255f262104856a974d1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBMA22462135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2dd79859f783176a6fb3e70f138a52f667963b14280dfb1caa591988103b48. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22541732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c885ac634be24ee54b1784225afa24e42808e535ddb87ed8dfb2c2341ffb226. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22541733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7b5242450e5bd42ea99be26948a75fae7b7490ca65134adea69141967a286d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22541734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4ced611ad38016ce0a47e481bfe4eab77a2243a6947a453b866a37294be15a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22541735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec8d5f9912f5f460fd027709f60ee5749f950d45c0a5b359008b3dcab2cd14e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKXN22541736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccf7ca090ea04e9ef74d3feffbea6317d8ac1d1fda81a0e1691e842525f1a6e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22541737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099a485bcde64939c87d946898e00a53dfbac5b783cb0d1b7a62505033ce6ab5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKXN22541738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e1ce692ddefb37288aa40cfa8e91ffb60d2aac610a27bc59d0e004f8cd9761. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKXN22541739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495199ea6b65d23f1e804afefa6666b925d4042ac5d3c2019e60d8451c097390. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKXN22422102.