thumb|Don Huonot at Ankkarock 2010, Korso, Vantaa, Finland Don Huonot was one of the most popular Finnish rock bands in Finland in the 1990s. They had many radio hits and their live sessions were kno
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 0x6494dc6ecdf206575439d2cb88efec80537d81570b7bf171e1f4000999d32165. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/004e4a6b-90b1-4b64-915b-40dba276fe89.json and https://artists.proofprofile.net/proofs/artist/004e4a6b-90b1-4b64-915b-40dba276fe89.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 0xc40c133d269aabed2c5f80279627e93df840413dcf505248d8392118be9e9763. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:52Z), 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/FIJKA9100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aaa6b7a7818a7a641c3cc1c6074ac77a9c822ef1bafb61c2006996dfc940aa. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FIJKA9400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac41093e4fb50fa2d970d0fcdf48daef4d98da8d78973cec9cf4031c70b572c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FIJKA9500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b48b1fa8384a860a3e5d15c736ccdfd523d7d4f4982fa911a0015b50d2ad268. 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/FIBAR9700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb1dee85bb1728f07383544e3610104008836adf5e02d462ceb2d3205ba0b96. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/FIBAR9700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8efb44e6bbd83c32d247253b7531bcf714c6c82b0cdaf7faed9a464473e137. 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/FIBAR9900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe911078d0b27196d01ce71ea1b1100ebc152309bc46bdd77c196a35b2b2e537. 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/FIBAR9900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed9e6b35f4906c2faa1e3b311e51eb5184b4b51ed1e370909aff167e658ad26. 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/FIBAR9900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26664109ddf8c984209346cdeff8849da09b02fd9ffdb4225cb42a95064046. 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/FIBAR9900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dc6a150ff065f0ae5818ea4215a54d4273e4ed05c156a2e81d343c0b26be3c. 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/FIBAR9900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b59d1bea7308be74945dde6276ececbac7d01dc7304ece3e8d458de84287807. 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/FIBAR9900174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded85e5c23d67b6634586158fa44816782a471c98e6954cec0520b10d0949fa. 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/FIBAR9900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7239085491b516a36a01949872e1546c448de1f8489b7bab61db562113e4607c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:51Z), 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/FIBAR0200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba59c21e09c5cb9a42bc610b61344a53ef66a6e6569b2ba8ecdc33d39eae9b91. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIBAR0300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c414f25ef895daebc0ebeb115275e6a297af5aded109d6446195676f688b350. 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/FIBAR9700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c0248d24ac113afe3443248bdb24d72b17ea8df8afc959e274630846521d90. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIBAR9900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26664109ddf8c984209346cdeff8849da09b02fd9ffdb4225cb42a95064046. 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/FIBAR9900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba59c21e09c5cb9a42bc610b61344a53ef66a6e6569b2ba8ecdc33d39eae9b91. 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/FIBAR0300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed9e6b35f4906c2faa1e3b311e51eb5184b4b51ed1e370909aff167e658ad26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIBAR9900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396fa55996ebaa36d7c6f18ee84c2f9254c830e5ff2cfc908c1dd31d9e2ac13e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FIUM71400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd99cd220cc96088cdbbd709e1cf6e3b6e26a8598132a323d3ded5bdbdb70cc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FIWMA1400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e039952904a2aae217256c9a2c97206b21275d56aa0793aa649f18c71741d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIWMA1400287.