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 0x6c5bb68cb4d6840b3b0f0d053fc8f8c9c1c868ed768cc4c9184cabe2011a37e5. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e47548f3-c905-481f-b305-b95414679def.json and https://artists.proofprofile.net/proofs/artist/e47548f3-c905-481f-b305-b95414679def.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 0x1c4ee4b052830a11eb2a680ccb9f834e006d6d9bae8f6bae69dba98706cb42bc. 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/CAJ221600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325a79361f2e692df5f2569d69f50abeb46b15b7c20b2db351385ec65632aac. 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/USBCS0500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deeabf7f67b750f612314baf9683a589e015921d1b2b5b3334432fabf270896. 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/FR4EO1500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d028fd254e7186d621f7acfe0c43a59cae94eac81653ee11d752951e9e63a. 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/DEA891300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f59e667d9a7b735c8a443bbcec9e77a36a1130792b711ebc3dbbc0be39bf780. 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/FR1F39500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1174fd3c2ef9c5f94dd637bd93fec6e6bf4effd19ba51fda5331df1b3adbe3c0. 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/FR14F9300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660658cc829f2a10ba89eff5cbaa02d42e064e63132dae67ac3c5839a839da88. 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/FR8E71401450.
Some of My Best Friends Are the Blues (feat. Bireli Lagrene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54581297d1880de7f20f860315d4708e06f910507a194c7be593edbc5d852fef. 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/FR71P0400120.
Pop In Jazz (The Greatest Jazz Covers of Pop Hits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156f219948479cd67130c6acdc67b2e26d31ee2cd372f041d3dee44dd7f09809. 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/DEA891000856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1117533945486c890e0c34bd75a40ed039a86bfc854f7ca7132e3b410f7d63d3. 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/FR47Q0603740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363f44340b4b29dc695258d0de000f5ede59bb1cd3c55dce6e1ae6a4387fbad0. 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/FR6F31642410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639034ffcaf42134fe974d3ba96037a3e0e430b086f190b4c4da4677ab1aba9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEA891001203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3708239891f1febc6a1b0718e9d4028e78e8f61231e0405165aa3b1e664fc28. 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/FRX190802365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8ea9ec81fdfa0e99e8c289779ccc7986f9d4abd98c4b15d219c9a41f2873ec. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W11008106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc684bcf50ada646617fbd6006c42bf3cc3d65982c3b16a3385c1653726955a. 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/FR6F31642430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffc77cff062a54b328ea9624e5d8d49a6e48e18246e5a1a81033229b6f346c3. 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/GBMEZ0733974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c2b16be8614092a8ee3e43d63e260160d8ea6ee3a052dd0b083ba9a38f5eda. 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/FR1F30500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578a98e60074d15ad5294bf3d3f477763fb4ea1ab21bfbf6d8f4f50231a0ecaa. 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/DEA891400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cb79ee46e3a03d16dcdbe1f367b40b7cc4e3c8440d5f084a692a5d37d2f483. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR6F31642420.
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 0x5b1841fad3bacd27760a5173ccfbaeb6756a3826a8def20dd6f550977953698b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR0GK1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e84b5ba3acd944b2abceecc221d3dd1366d89fb76a798269413c3253587b4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR0GK1800008.
Eric Le Lann and Jean-Marie Ecay Play Jobim
Live in Paris, Petit Journal Montparnasse (1996)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ec435408244b9184954a57dfbb6a0ca0854ffa9818bf0c4ba9a14a66ec1a9. 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/FRZWS9508407.
David Bowie in Jazz (A Jazz Tribute to David Bowie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece48932fec6a24700520279d8f7589080b3a7adeb7584b7bafe07493a5a85c. 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/CA31S1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26556779c7596cc34b9568e9f73a123e08d455ae1c9e3b0d139b82ae41ede131. 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/ITB551513758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c2b16be8614092a8ee3e43d63e260160d8ea6ee3a052dd0b083ba9a38f5eda. 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/FR1F30500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c1f975ccd0e2b5d3d95bbd34d1e8fa637624b1a6b99c5c63fa194d073abee. 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/FRY671910106.
Life on Mars (feat. Paul Lay, Sylvain Romano & Donald Kontomanou)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4afeeaa6a93ca75453caeef05e053daafd51ed7d7123c2c0b56506d2574920. 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/FR9W11508140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac24fcf64361988ab80e3679adafa4c4f1dc70501db2981819fc55d6256c74f. 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/DEBL60948193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473448628998575d9bf254440a6688bc6e82fdf6d0b46b15356e797ded87911b. 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/FR9W11923372.