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 0x857c25a3c98cf427e73784b0cb91b53ddb00141479ae2e74da723f102f0eca21. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05e94cda-26bb-4176-af4f-451d010b48b6.json and https://artists.proofprofile.net/proofs/artist/05e94cda-26bb-4176-af4f-451d010b48b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ben van Dijk bass trombone plays classical evergreens
Ben van Dijk bass trombone plays Astor Piazzolla
World Concerto Bass Trombone and Brass Band
The Amsterdam Staff Band of the Salvation Army
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 0x7a0b9d08d6c3cbd29a03e2e725dc8967a940d5e864ecf627d481203815aabedf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM21461200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2768334b5f3ad6b6ee0604c5f6ab575c1e3d65cdc12d309a58125d0da058c. 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/USHM21461202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd7a68aad09b540331e1be06802cb148caf6a89f40ac88d62876641ad3965ca. 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/USHM21461205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0bc10627e5c70626861caead3b3e82249ecfaf05c4c7dcd9ea07fee8f5b175. 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/USHM21461209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3421d2fe01632373726e45e44d6c92c224ce7c581eb86a46c4e26f29ea5feb. 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/USHM21461212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ce18e54f9384e469fbf0333fe39fde7afe70e5fcbd555c69134d902345a83. 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/USHM21461214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53343caf882a4143a1ad52bf17e0826bda45236629cc8075e3eb6d96a0287f83. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:10Z), 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/USHM21461203.
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 0x26104ac9b9e9a0796fecc084c51265fd1e2d7f61033c51026029c3bee3f99c73. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USHM21461201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad4674c7a77d5267be3f5bb30ce83bb28154fd485544ce01568580549c05f35. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM21461204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedf967fe7040accc345017b93e0149199405cf8a91b680eaa1e0ae6555e2cde. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM21461206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d86813647edce69a51e184b4581c96a573874f27511c59c4963515ffd67341. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USHM21461207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ccfe7e868c300887f0c65f969ad31aef90a363a832d0590c2783c80c251b07. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM21461208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2821a8fba4bce7d792d7aee9de85b8640c29ba31a1198a321cff7091e2431c9e. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USHM21461211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ecf9a4b3f3ae717df612e533ff22d621e4b3c8b4868e891555d7dbd776d7b0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM21461213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2470f5a280d03868b1bc8caf9f070855dc33141975a571df87f39a05c5ec45d3. 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/USHM81081977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ef376e9cc59f1db321aeed4758e1b6c39ae17585fb3ae38f5249d193ed93e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM81081978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d10758b9a53a42d25289688ed2f4a95ae3cca1d91a77560c1132e519eb32436. 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/USHM81081983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf228de6309c07b979a2964bb8587482a75e74acea0341f11570c22372a82ace. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM81081979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90561a13bad90ade32455d6e9b3fbc82021c82bcbf7779e4054010a851cd7f30. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM81081980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e96ab00eead766c972eaf10203eaee8cfe6f2ee0ef05ee8a05149a368a718f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM81081981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed804ab4ca3a6e7aa31819b4729e667ecabe1979bf6deda8d252ee83bdae9bc. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USHM81081982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff80246c9087457f34d1ab966b1af22ce60b889a0ac3b4382c5ec7290231245. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZRP52410914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5425b50260b3cfd38c3f74f45a9565c0701e10f61205dec3f0a962558e00c131. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZRP52410913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d2c16cf331ab6d3c26a7509c86655335b9b9d792cc6997d9938d68b8487c0. 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/USDY41646371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b78d6f56c74e8bfc5d2ba26bd42df25e39fea5c602624157c95684ff0f12b6e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USDY41646369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaea8c17ac94465fd356304fd13ed6bea19f7b98a46e9fc86faedb7e49f2fb41. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDY41646372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e661eba35f8f9ca66d7ceb451fd35fc4f091c8537cff0d28bfe78d284b5589. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USDY41646375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4634aa262c5e5711bb8288a92f8a39ed4e4a88f2f3039b47ac35ce9075ae6a5b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USDY41646376.
Chiquilin de Bachin Ben van Dijk bass trombone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf048af06e38ad2c1915895f301f87fdc23a138674500606c9eff83d4ab34da5d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USHM82088258.
Woud: Serenade / Bourgeois: Fantasia On the Hexachord
Trombone Quartet, Op. 117: I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1335e7b0e838cac049f20a16ca3353c77c0190910133aa7690a98e7e3b1f217. 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/SEAEI9784070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0bdc4126127314e141346472c8ddbc9575f2c7e6a6f048a0b6b7be006f9d63. 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/SEAEI9784090.
3 Swedish Tunes: III. Walking Tune from Appelbo (Ganglat fran Appelbo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d043864b9abd8ec95c055aba12706159fb1cde5c33ffd4ac3b9d85cb921233. 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/SEAEI9784150.
Trombone Quartet, Op. 117: II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351253ebec9dfb5d3f956109f336fabced5352ea341a1a9ff30a254ebdf74aed. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEAEI9784080.
Amsterdam Staff Band of the Salvation Army
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff7bb44572dcf35fb260dc180d1347bd7954a127d9c1615466583987e64991. 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/USCGJ1900391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9e3789afc6519a5458338c726c9bd0d8cc4b0623071550eb9f5f6539d3b8f5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ1900392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7fd75a1f8c65378249257888a0ab47d0a75ebb0687243c811367b5cac835c. 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/USCGJ1900397.