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 0x2bf627a557e6a13db7980c3f8fc27c7b4464ef1c5171122eb64d01733c4f37a8. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99e640af-c6cb-4e3d-947d-97b4ec2581d2.json and https://artists.proofprofile.net/proofs/artist/99e640af-c6cb-4e3d-947d-97b4ec2581d2.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 0xfaa23bd485c543ec1332376e33d8c499d11bcc694bf2e0ae36028fc71cd92971. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJN2531192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe981fccd7b0b9f6c5dadaed2ec5657607eb19ab9ceff2b944e6630c2b21b204b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJN2531196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6b6bc0d75dcd55ec583ec77aa13be76c8acbc379eb0ae6ae040362e4002d33. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJN2531198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf90834abbdc7f60c51e7be4360c59163446db161ac7f49c87452ed8debb6b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJN2531201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e1f5ef0b43a15374cb201d96d26a92ff8c7949508a168fb0e9beb6f744fff8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJN2531206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0734e9a9fd50e69595b9d06a10ad6246e933c096831e36f6f7dcc69d89e138. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAJO2531210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a93543173f4fdd18ef66af2d0c8ab6faac9bf5cbb31e836a8e857711eddf13. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJN2531214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78994039dbe7a9ba50bdccd931a5f67378e917dc6e6cf7a0885ae84ff9834a6b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAJN2531216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e92fa784e012afe117e2b5a91cc89b691e28afb68a472db10febc761f284d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJO2531218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd78644a705b5b498e431fecb7f3629841c8656129dc86b151727b596c97751. 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/TCAJN2531219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7c6dab187f6e6043cf5d338675bd14aa7e7f3533401a6dcf05a0b6e74aaaf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJN2531222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186597f12498c936040b4a77aaf24b986f28695dff082005d001237431c6826d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJN2531227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c2c7db937055051497838b7283d5d0280953bea8db56d73f3f79e5c970cce. 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/TCAJO2531231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71cabadbec590ac1a3f1ca51dffa7f8207df0107aa97ef242491fe4a58c4d0f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAJO2531233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a22878eb643098330aff9061a3258e2d51295a4856b1eb7e894351fe618243b. 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/TCAJN2531237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc54cb935d9aa4a0d51e0c6ce0c430a26633e54032d442a0dea680c9c58f6c. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAJN2531241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc091682c3c37c829ae5f75c9a97bb4f2c9872bb52a03e02dff1d319fca6f39. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAJN2531243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad8cb2e14ea8378b409944dc48fe083805f5fa90ee5e995bea2e47076b86f41. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJN2531245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822364095a858436186efc0e1fe71d10289dbd49df5acb3081b98e2fbd204233. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJN2531246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef10cc980453426eccfdd70ace956187128febc137309692b12844860873f724. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJN2531250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deec77dfd92b400f53c40965a709e0ba348660131304ce7ae600118e1df6cb2. 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/TCAJN2531252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfb8546b5998cfbe223ba4440847675ab4d9d78ea0d84dac3445b2098cd35a0. 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/TCAJN2531255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef9d990c25938901c857a620d879b533562ac4eb892794cc849defccde2cf69. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJN2531261.