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 0x983cb932fb13d14cd3956206b179dd0d7356a5d1116c533acb1c03cbfc1bc3bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92252229-964e-4b37-a34b-46b1ed70ffc6.json and https://artists.proofprofile.net/proofs/artist/92252229-964e-4b37-a34b-46b1ed70ffc6.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 0xb9530b29a1bc6a2933a33e607e360316a786536e84d43e546a3ceeb646a82102. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTAZ2397007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3089e13048d1825f03bc48a358bbc56e59bb97ea5ca1b37cc77c091b36727b. 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/QZDA52414148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a2797f2811ff03f171b7be29edfd3ea68038736c77d8320ce8e0728d71474. 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/QZDA52414149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbabd1ede973bb53e89be190a30df962a86f741f60f44270c3c5ed74688225f. 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/QZDA52414150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc277237999a2f5bc0e184cc94f995eabdcfe4c1748efe55e7eac3cfc4dd583cc. 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/QZWFQ2336691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f0946d65d13ed624f0094e94cb5d492e123590a9ba543a8ddc31934e9cd40e. 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/QZDA52414151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e3a9ef101b70885a1f853a9c74018893460afb54502e0f748c12c5a9fff2ca. 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/QZDA52414152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12172904c710dc05798081895b9b00730dc30622e103c30417d8ed6862f89cc2. 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/QZDA52414153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8462150d39acce8f0dc56cd04c0db2162df00615fde3f44a27d863cdc67fd93. 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/QZDA52414154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88b6b8e61fc586772ce1b0e20da226439d11539e64b05fb93cb58f0382f2ef. 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/QZDA52414155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468522fd02189f18b4aa4a767aaba51dec7f6d57cbdaee71af7a7707af792f5e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:20Z), 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/QZDA52414156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586218c7476c1d80c897ab1cf9fd96161dbb789a71976b53e898f7fce08b3d1e. 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/QZDA52414157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fef1aa2f6d351990ce99eb4ff492cb20635023e19c0d9f0ae356542d871ef3. 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/QZDA52414158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbf02af91c9cf4ab8731b0ec27218b964fa9768dc2f3ff72c36bae8522895d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA52414159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6facb9ddb2e3fc72879cacb2ba09900a6666274aaa3f546aa3f6c86901eb0281. 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/QZDA52414160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30490d43e08945b80bad13b74ec3a09f806bdb1193f0b3260a577eb3699755ca. 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/QZDA52414162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999acde5d8bb69199573ba81919e2ed018adca98df42c618534dc423c0c62f42. 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/QZDA52414163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b31cc4cd0e67547f30d0dc824e99d4c842e2988ebd05e0f7f2fb15a641181a. 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/QZDA52414164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe948479aa6975623c756df2e5b370c1253e8892a481aeb3fd29740be7c1d2f01. 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/QZDA52414166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295dea6aac3d24539c8126ce685c3273e17a8e94a87c7762e524d8341995529f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZDA52414147.
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 0x0b0b7985b4547903fe5466a1f00a3405efc4068c63b1a6acec80151ba65d2e05. 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/QZDA52414161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6707c58c5ccb76e9a97ead33db9ac592b19123a14ab15e88bd754b59716113. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZDA52414165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd112d82fbf09165a5680e8a217487d56620e3413e6862fe388c76f9a3580b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDA52414167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793535f37960bae9edada14af89ea4dbc2424bfd4e8f639ea7562097775408b1. 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/USANG2409960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2477d2fefe8b3ca593aa961e48642ce989cfc54c2134c6ab42a6d723084a44. 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/QZTAY2432647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0311490154b44cc928781bbba781eac6faaff5d50dbc88a745094b16c7c83abc. 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/QZNWQ2376701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bab94044d3876a7084240c005d5c4f3464137dc69874f72a8ca0920f0fa600. 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/QZMER2340171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab8cee6670d4d5b6ab66b2e154fb87a5fe24f178768b9e4a903927c631e533e. 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/QZMEP2316737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c834b9cfc34a998ba3057063517a9fbf5fb8c140ff6529d3a036272d230d1e7. 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/QZNWR2291843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd209b72a8417c5debfa50dad63e7a67d7bdc58bc92ee182fb1dfa855ca0ff63. 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/QZMEQ2274253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe1fab08314d0308bba9b67f23e6eb816720151ad274762fa95ddc12befc3d7. 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/QZMEP2255840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52343ed72885f91f203c06c8370f673aa1dc117daf463b2343b7aa167c92de. 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/QZMEP2255534.