The stapes or stirrup is a bone in the middle ear of humans and other tetrapods which is involved in the conduction of sound vibrations to the inner ear. This bone is connected to the oval window by i
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 0xa7769f3b46da29828deaf0d010d8c8e3381782b1a5fcd8e3b602c7c5e1401f56. 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/2fd18f3b-9920-445a-a70e-2f0a310e94fb.json and https://artists.proofprofile.net/proofs/artist/2fd18f3b-9920-445a-a70e-2f0a310e94fb.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 0x468dc08cce3f383f0adb270aaadb23becc3352eef0e10c1912942c761063b3e5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB1907069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8a7d37e6bbf564d9611c0842e7907a3537e34f220309bdffe2ed9256c5df2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHNC1927300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee9784f447009468e1a4455c2148a768a4da6ff03ba47738731a4c7b22f0c72. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHNC1942661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e684f3941067707ab5c956012951ffd0abced0dad45979217a00db70cfb495. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN82046244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f86bd8c824d4c1f1323bdb113378914338634c4390e50eb057871636fa233dc. 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/QZDA52134394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7045061df858205827cc7362a499227f863a5e4919fdc2f93fb74c74f732fc1d. 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/US3DF2255516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78972952669ef259fddc2be374be93db3427711e19ce651edddcff6af3addd36. 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/US3DF2264524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb562c42534f7976f716b774a272031f5cda718a56ea287fcf00ee8322745fd0a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USANG2221897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f3ff1a4a866f831967a1436e6e67b7744d9ad221a041f67346a973b78b47a4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:39Z), 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/USANG2228401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117cc8bc80993246f081ccdf6c27e00cbb7321e73481d1351fe52362f4e9d978. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:48Z), 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/USANG2291448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937dff1d679dbf8e246f9ee847f1e3505b0ece66b25f06caf04cacdffd745f2. 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/QM3DF2297163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa407c832f1ead17dd3aed428ac21a55526c35be9b6e6658bf1b5241c8b1bada5. 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/QMANG2208692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd5f7efc3739052404d0bbe7c4fca84ed6f48af423d6b0c84f5ca6002fb4b39. 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/QMANG2208694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31702376276d2dd729b4a76cd04ff863b27b6268e80232d6ddbc04d52c93bcdb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMANG2223110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c71c066e6fbcdda7d0a43d49c9cb3f152965470ec46a7f2307501b22b6b5b3a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEZC62492739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5702f865e4b4589956b4684add66e34d2d868eefa0396856d48d8a8f27e9c209. 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/QZES52467243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf3245c369030f05cbaeeff85bb5994785f118e68864facb21893f8c76b36c. 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/QZES92412767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45a96e3b6b0883616846a5496764f02b777a059b4b08e540aac95955e2a59fb. 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/US3DF2422470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5702f865e4b4589956b4684add66e34d2d868eefa0396856d48d8a8f27e9c209. 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/QZES52467243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf3245c369030f05cbaeeff85bb5994785f118e68864facb21893f8c76b36c. 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/QZES92412767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55a49931d810b9049bb9e0b7173bc4f61aac2b0b7f2682a422af95fa710bd5d. 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/US3DF2422462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626abc97ea242e92f22d3e3a15da9fcd9f47c2bffc42e4d3fc48e904a9d1b9e. 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/US3DF2422463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64fda65ef822f9979d81b82dcd4423ba38c0a3f310bb9031295f820cd688f05. 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/US3DF2422464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58114c92112bab23a3379a8402fbce4a09da6b6af5cae7b7fd0bc5eb1bc3e61. 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/US3DF2422465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e7dcdba3b6eef77f13d1b61a8d9d5a58b7641d0f3bd332e8c5173434122563. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF2447932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3278740852f92f3b882d429dfd1ddae5369e738434784879d7aed998d01b0d. 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/US3DF2476984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33fb1e600d00fcb23596367f08f27b9ddf386aa8ae6898dfc8f6b76e12285c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2550279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67554d7fb78e1b0537d8f911a98f29c9d4f5dbe227ef545decdc98701ab942cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF2594239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678b1edf9c3a8d25567b36f2380a5d6ae4a3a9b469612385802b61c095e81031. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USANG2501303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6100072e34b7b17bf97c1304b792a5b1f5312ed33e7d42ffbf23b1d5d3655f2e. 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/USANG2210418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb562c42534f7976f716b774a272031f5cda718a56ea287fcf00ee8322745fd0a. 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/USANG2221897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad10e953b7e7f067fbd65963ff806e887171a447bc2d9bd8115e810a0577bd59. 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/USANG2203305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dab3298103fc1601e03733e07e2197de2ba339c109e3c134f99a4da5f5ead8b. 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/US3DF2459699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1133e58cc53037544efc37c352565dc39af551a3df483987d249b5554a524d83. 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/QMANG2232049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe011e7c16caa1781aa8828ae19209009b0c9bf6e88644e8546fb0f5fc0aeb404. 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/US3DF2437059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef835a5acfcb9813121683d53c4feb55cfb88cf670a294535e326daf321544f9. 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/US3DF2437058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e7dcdba3b6eef77f13d1b61a8d9d5a58b7641d0f3bd332e8c5173434122563. 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/US3DF2447932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31702376276d2dd729b4a76cd04ff863b27b6268e80232d6ddbc04d52c93bcdb. 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/QMANG2223110.