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 0x9467486c5093310d54899e1ff3defb898e45f98c6511fe4cdcf314e2ffe7a30f. 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/757573db-e580-41c3-b700-509ead9aeea3.json and https://artists.proofprofile.net/proofs/artist/757573db-e580-41c3-b700-509ead9aeea3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Romance and Reflection - New Year's Nostalgia with Rudy Vallée
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 0xfa3508e12fbae1aecb12598df38ed60d40ac7e2a6e8aabd1401a86fcf7530bbb. 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/NLHR52179485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3928889a3cc05a06cea8898067d7242a742761493cb4daaa627131b2c5289f0. 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/NLHR52179486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab28e83e5433602f292b7256801370bba785235f69a391536fd432107d00ffb. 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/NLHR52179489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d07095197c426ee9433fe3c0dd1e9a4160d83eec3381dd47daa10c046cb301. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLHR52179490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec7a56e472b090a92f8729af6cebb748ccae93918b58f46db18b35774e8e6b. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NLHR52179494.
Smooth and Suave - Crooning Classics with Rudy Vallee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927efdf2f3780b55437f4d6fb581c7cd37f2b40ed38514c8cc35e991aa75415f. 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/NLHR52147462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da3cf7ef7eaf3201eed8e9875d5d6aa091e0469e1305765a5bd9956931e7dc8. 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/NLHR52147468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba830982213d534c13ea33b0130d7f3233d6577d77515fa7fae585260885060. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLHR52147469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6467bdd67218163d0f122e6a4a51e48ec362d92f2635447be120d4c3d5817db. 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/NLHR52147472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bafee930b7c83980b4a057311047399e3a385cdf245bb4762b60ddca3f68f8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NLHR52147474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c795019480d06b54eb396e57480be91a9960fd7324b6b7aa42a06dc11a7781. 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/NLHR52147475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b01d247ba472d5aed645f83605be7819549f02ca6f10fbc1273f36ca00531f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLHR52147476.
Rudy Vallee & His Connecticut Yankees (Jazz Vocal and Dance Band) [Recorded 1929 -1932] [Encore 2]
The Album of My Dreams (Victor 22118) [Recorded 1929]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1d3b67d944688efb26b20fa9f22e8fbd005f7e0c5f45f6f0771cf71907c56. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USDHM2000036.
Violet (Friends) [Victor 22473] [Recorded 1930]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d17ef9cd64a676198d8995c3f4c3d662d0ea2d21c8d4c8ea8816e854b562e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDHM2000044.
Confessin’ That I Love You (Victor 22506) [Recorded 1930]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1e58e1f8d412aec62ed38c8468ce064ff59ecdc506c4c55d81db5f8b806da. 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/USDHM2000045.
Was That the Human Thing to Do? (How C-I-2) [Recorded 1932]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c164f814ee5702c691a94f0a0fd8c46a78eac00550d807ae6d01d60df2927b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDHM2000047.
The Wooden Soldier and the China Doll (How C-3-4) [Recorded 1932]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d372f1b43d76e846b69412cfaad8403582f445e08ff4ec312c19ba81573b6c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USDHM2000053.
Rudy Vallee & His Connecticut Yankees (Jazz Vocal and Dance Band) [Recorded 1928 - 1929] [Encore 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189572fe003bad69ac6f28094b4365b9b0360a7adf4430b289a6c1687cc20884. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ZAC481807133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36c9dd9a5676f8d160932912807231b96fc00a7cb7ec7f7ad59d21da6f2409b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ZAC481807143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31784e2a1ea9da0e4f252ca2d866de02ccb1372355b0cf3107a49e406b79053e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ZAC481807157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73abc3adcb0930200300e2e17d21bacf2b02a97e1feeeeda4c935a31ac7e31e0. 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/USXTG1100970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc084df037b5be3f781ad587aa99868b82043cfebfe4547860bb462f454fb4. 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/USXTG1100981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06ae8df2e222d0914c791150e55ce7baf819c6284e4edd2ea192da73f63cf59. 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/USXTG1100983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee23e173f80d0045763dd6dc34a790d4e418536b94880314e9b2b4b377a89dd. 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/USXTG1100987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372da3a0427d1078fcbbf700c84ed1f57a1e7a642f5fc65fc8494339bfbc16e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEBL61222223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e97f0d989dd059fa13399266f178ed52f5fc7ce92208aff44821cd990f217a9. 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/DEBL61222227.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13b295c759b030d9b562b347fec8a7b86f40d7fef8b4f8cbcf30c0e598599f4. 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/DEL111801444.