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 0x2068afd8187af94c923f551c6b757b6d3890bb1cb80794dad2b9b75cf7311a05. 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/9b0387ce-889c-4fac-bd56-9bec01490ad9.json and https://artists.proofprofile.net/proofs/artist/9b0387ce-889c-4fac-bd56-9bec01490ad9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Modern Acoustic Music for Beautiful Weddings, Vol. 5
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 0xebc15c37de4181ea87790cd677d4accba5a1921bf56cded3cd596ecb27443f3d. 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/USFKP0601311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcbbdd5cad367d99f4c099a47c2618262c28547bfae16d948cb434e065d986c. 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/USFKP0601312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b08c17db32b7d5bfbdcc9b79c4b0354de761e67cf6153c6d9fcb6c918c94c1c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USFKP0601322.
Modern Acoustic Guitar Music for Beautiful Weddings, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd537967f25df3af76b049ca264158b61a38c3d54b6e1756da37696245de8197f. 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/USFKP0601200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1125a72e7050fa4fae3c667826ca63e96af3d09cfcc0041df20fc499827b00b2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USFKP0601201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76a88a6fcfe842599f344de86fcd61e0a096955c12de6ca7ffca8bedae7a9b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USFKP0601202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7aa8301f2d68909711bc9d41e7cd321237a1905283202aa183be5aed3fbe65. 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/USFKP0601203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f97952222583fbeda8fe1d7239515a5c92870379e92dd4c8e4222d645beca. 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/USFKP0601204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc1c3782c333bc8b14bd849a5a57dfccbc45d7e7e7bbd21e9e555e56d1bf68c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USFKP0601205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d806d64867a87cc21d141e1c97029de5fda36b30e25410b1f5bfeddb3b19c. 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/USFKP0601206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aee31b364e3920dae33d0ea76f5056a2da99c081a442e8e714e45460690338f. 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/USFKP0601207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a765baf74bccdad172fbb267035caaa45ca186f8bf1c5e6e0264c835ba4842. 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/USFKP0601209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39358d2480ed4b03d28dfd3b4f03f260cd2af583ae76e1f456446876e0239a8. 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/USFKP0601210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b4fc017527bd16723b1b91e7d7084399bafcb7778443cfc7970577f47f7b29. 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/USFKP0601211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec339eb15d04b732a9cc16d81b0f7e20d6cf362873b67aeddcd476fbf3fab72. 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/USFKP0601212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162a87781428ed9de21b6f904cfd52fc1116e758bc4045ca719811422973c8c1. 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/USFKP0601213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612c945a2b959ecb1ce654c22c11a6d96ba6fb5180f45e7772b9ce255275071. 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/USFKP0601214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e039d5a52fdc1fa8c06778298126d54efb171280d932e31bc7b78320ae771f0. 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/USFKP0601215.
Modern Acoustic Guitar Music for Beautiful Weddings, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9227986ade8962a743d8e4660d5a74d35520f2bbceadb67de5994a88679bd. 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/USFKP0600956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5042cad0176c1fa92357d67bb7cfd0433b6a9694c37eecaa16b3e4aeda58c9. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USFKP0600957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934299a79e4bc081601d49aae850ce75632524d0f00720cdea0e8f58dfcbca11. 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/USFKP0600958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76cd1cedc31961b37258edd8f4baae5ef620f38a6b9d04c213f7784e5cee550. 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/USFKP0600959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08170e3d32fd3d2b48ba04776634afbc40b3f81e2b4672e78661f63d68cf91e. 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/USFKP0600961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e178df2e163effebdfdbeb3e6476a59bb9cf165c5a72d67e928a52802484a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USFKP0600962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cdf0b36134b9d4cd0e8ca80639d6b70a269d14946ade6c43b3f93a9053644d. 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/USFKP0600965.
Modern Acoustic Guitar Music for Beautiful Weddings, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2e45318931982cac926791ec290ed2510ef75188416c39a3e689ef65086445. 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/USFKP0600976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc01575ce71c8cfdcc3d92a89cbd557556e478b8aaf7a1e9193de0b045f8a6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USFKP0600982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73edd0104e58f1687e061937404060793a6546f5c65cbb2c826d212d48bb6c36. 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/USFKP0600983.
Modern Acoustic Guitar Music for Beautiful Weddings, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c886f1e09282d120f83b956d343a8c8fb5ce0b7ad4f61d2e2e3ff974ea238aa. 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/USFKP0600990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b5f5e39c4ac13e90fc871ff8eb9bbcf9e5e5bdcdca93037bf314c5c906aef0. 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/USFKP0600991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7076a711e9428fbcff115ff87898b65817cc3d767927c0225dca333a8bbc812b. 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/USFKP0600995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10ab278680380b7720f020629cc0c7e4c02f526e3bbb8647b9a3964c58fa3e9. 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/USFKP0600996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171acaffc9553435145eef2db434929d7bedc2b0421fdc94085500b08b3a9cdd. 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/USFKP0600997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7dd3094dd0cab1bc54dbadbf44d63e6f5bdc0ca6535cf1ff099dd328a35851. 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/USFKP0600998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f65128453f9e01ec36a34a197feab3d047919e144dd17c12ff22fed3bd59662. 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/USFKP0600999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603911f12727d51695795df1d2309baad78a94b119c172f92ebfaf10a7e76372. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USFKP0601000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea49a653d5083d7c05825d0f843988974236d3e36a0bc42b083e0d04b22ce44. 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/USFKP0601002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a76a6256753c3b539e51c7a1655145f59d832e7dcbe222459784c3d6dc78f2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USFKP0601003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ac9131ef96a5842d9180f5fc627ecfa9991b48af17979762b0864bdaeef349. 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/USFKP0601004.