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 0xd5f57bd28f0fc577220b5a603c9b0ba7f7317de3aa55324e88bd052ad3a8973f. 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/b8a91127-b622-43cd-8472-e9df7b967992.json and https://artists.proofprofile.net/proofs/artist/b8a91127-b622-43cd-8472-e9df7b967992.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 0xefa316bbdc96afeeb1a81c01c07212acadfc9fac83bea02c1938e502ec4f4aa1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZES62049227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3df54aba6370b6f6b63f2ae5b73b59f9b76501f54bcf306f47dc0088ca78f30. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32078519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5571c6f4d0a45892d1d626e047b0ede3a01354c41f3155b1585f4f33c51251f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UK6KW2000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80863591a43bfb2406ff9cd97ea7c210f46f62bdcd751b8b0429cb9110acc604. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZES72156349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9482b004f9426877e1c4e15b65fe7012974040334b5f86196dff09682f1afe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUMEV2158524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11344ce4c404244bd1ccef10e171070a242ad1288b4fc0dbd34fca06427d1929. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZHN92145013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de4e3ad67cc9ee4860e7890d6aecca13e79d137da3bbf3df261618b9270fde9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZDA52102634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9482b004f9426877e1c4e15b65fe7012974040334b5f86196dff09682f1afe. 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/AUMEV2158524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2f988cf6b3313ddfec971ac96e37869552718e5c9120ca43a00d0470e0d213. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AUMEV2167698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554e322638dc39f08fbd2e02d68ce0d9fbd22900a5c4150fa97ade8b71b49a8b. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZK6N2150936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948949158de4e7461c5510242cc1069c964d1ef6cecc21ff7a7444a2df05f2e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SE5ZV2204901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6650f2ba3d77ec5c76bfe75c82ef93a53bc8ceafd08047dfcef2fde23dfced3. 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/SE5ZV2210401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92753e7ad86031308896a250906b63548693f4a8aac0e458a887854635dc9b16. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5ZV2215501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215e4114eebce8861398ebb857686da6afc3c4411abadf86f806f69d815b787c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMDA62265079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05931e8bfe86f664f9866c83fcc5d036d9e2d6138e603413a034efc14536523c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM4TX2306550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87904d02f160766c7cc7954b164632a3891114a88e455fe9115a1eab39e7a49e. 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/QM4TX2306547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dbb3d1432dfd6c32bc7a0a98126e1b32fb63a362958b73588ef6a2767c1582. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM4TX2376489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc870ae66bd64597c65147c18eee45170841a8133bb20f0c94f86364e95058382. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QM6N22371801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ec35bf37af944184b5307bde960d33b563ba191f6c68bdd4b1f5b52e96ddb. 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/QM6N22324786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dbb3d1432dfd6c32bc7a0a98126e1b32fb63a362958b73588ef6a2767c1582. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QM4TX2376489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adf6ac0d7d7a1975bab2539cedb2c0111791f9db5bd73b87b8a68013182da48. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42319685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478663464233c2e2e26738d1ea8c11fd28119f559617ade354f7c3777857fceb. 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/QM6P42319720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b494faac69963dcf449bd785830e991f9fe1c48edd1627af5372c1cb2b6fbd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM6P42319727.
Pohjola (Arr. for Strings by Carlos Hof)
New Beginning (Arr. for Strings by Carlos Hof)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7258e27d01195d1a71face3c24764c87017c4f18e04991f86638e28cd010984. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QM7282573852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9cd21ef97ccc314b2ae9082831eba5ca09f7a4c8a02e2804c0f6bce4597c3d. 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/QMDA62562133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bfebc7a3873f51991a0f4e0a2b4e3e656c37ebd5c2effc9faa70641e3fbc3f. 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/USQX92403616.