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 0x18f96f3afd6f44031e345d0eb63f3d265384e68a09a376288cc1139076b7ec5b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d27fab5c-c2b4-47d8-83d4-ae6d7035bf82.json and https://artists.proofprofile.net/proofs/artist/d27fab5c-c2b4-47d8-83d4-ae6d7035bf82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'intégrale 15 (Cantate pour un coeur bleu)
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 0xcbcaeefbeb21789642b78be0a7cf7ffc6473484097c627d72c75ef8850969405. 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/FR5P51600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f53e3a383237bcf49e1964057f4709d606901bd023934b88b1167b6a8230a4. 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/FR6V80301654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a18d64cf83a1d7b4449ba6130f952d692283cbb65da801280a65553821ac74. 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/FR6V80300981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfb712abc3c1bfb7eecdb0edf56268e48f4c6a1e18f3cd7da0da510b719b311. 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/FR6V80301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6637d50d5df7373ecb1e1413e30e7fcbfd069cffc719e190d02652df81235. 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/FR6V80301686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712cc243146770e340cb84077b12c19807087a791d46e63e565ffee71bd6b5cc. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR6V80301683.
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 0xddbdf1a4d9603a9272f8083ae5b47dbe4bc6eb0d8f49710f06c42a7b6c09ccb0. 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/FR6V80301684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92077d75e08840f61c1c5eab53621928335751e1e884365b7b4c38a0f840fe4e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR6V80301685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a486280d8e8964c34a3de76f7babe847e1c63ee46355d46c41b3f992626bd0. 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/FR6V80301690.
Chanson pour Margot (Hommage à Jean Dréjac)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227ea771abac3d9e0dd4c3d1b6542af73f6c593ac7585276005068574a64c138. 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/USRDG0610186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd864ad3be2d0940d9d81838d6f31f7df1d6a738ba74212f816e565d19e58726a. 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/USRDG0410362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcec1052e63d0e682b360d8554d151833ee70cce0e782f16e67d90de385ac24. 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/USRDG0111511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ec60592c486288007f8a3dd594d36a5d09a850e618f3203e6794b560971e80. 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/USRDG0211197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e14b413e9ae71751a4e61ce96b3637f4903de7bc07276d67129e12c55b5abf2. 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/USRDG0211180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6876da660227073e031e79d0a6a68404f699ef1c24720561be1be4ae36841e. 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/USRDG0210681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d301d3a6878627897887f7dc09a49c702354b8312dbd8209893d40cea05d04f. 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/USRDG0710230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26853e41347a3448428f7ad7ef9073fab31716a94f37106852332798bb3ad68b. 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/USRDG0111216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eaa0713eb1530825c535cd2245d02144b3ffaedcae2c143ae0937d2ed1e68c. 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/USRDG0210734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b20c36ede39bdc105f0447899b9496e722fb200d115936847d06269e9a9eb4. 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/USRDG0910052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4c6f788366cdc3fc9961e2041546d1f784fe6250de100a1e2f1f4b3ab164f6. 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/USRDG1010229.
Petit recueil de fêtes : 1. Le picador est mort
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e67e76cf23bb3e97dcde9fb6155398ce8f6865390c5675a3f6030f5e6fff9a6. 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/USRDG0910056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd2a2107d637a07829d0f77d37933b7fa93f0a83696b048fef131425e882c28. 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/USRDG0510503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557a020a9272ebc5566b93e39f05d1f8cae464a6bf4f773f39cb1ffed2631626. 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/USRDG0210674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72374323138b6fc511b377d1630c91da50c4a267052b1da8b5cdd6f8dd109512. 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/USRDG1110096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21faea05ca250315db83973abba62d357100bc01da2f3bdf0370daff303f4184. 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/USRDG1110079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b3e9957436af35834c06317bb3e7b99234e7715aeff81c9d6d6a48ab914193. 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/USRDG0210750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e10589643bd2f4f71bdcc4069a3d9a1363bdf2756dbba1ccf4911c67849756. 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/USRDG1110178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157c32b930ac9d7b77bc2b22e1f3b6c53dd427dbab98c2fa08124d1e2c051792. 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/USRDG0910050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd702d9f7127778001355d11cdfc55064de4a6455577aca19ef9fdba0a86e848d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USRDG1010224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294f0e05b6717c1e89024caba6212bf47868c525c79b0c24b392babc3d096d95. 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/USRDG0910120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee174aacd93f1a70e940f6ef3e86ce18b275d4dca095a803b9cc271df5d8426. 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/USRDG0910088.
Leprest Symphonique: Les derniers enregistrements d'Allain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb5261785a869882d8ad09faf7f10190559f93159514ea617df83febb0a385b. 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/FR5P51100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d99826dac7cce321aee9521b85d71a6415d1cac184dc4ddc6165c12913fc6f. 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/FR5P51100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f98461cd8c233483fbd28e4f633b6b9bc2699fefea97131e1c842d7a3a5e7. 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/FR5P51100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cf5fe90e47a273c89fa4c0a24290543c6a167c1b725781ff3072c97947a639. 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/FR5P51100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28751b04922b32630ce3eb298d44ff2b1aeff3e63f15a7b181d6a8bb431fcd56. 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/FR5P51100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c24aaec15d090585c97235ce203962278e5d9a2d8d5bc2edcb40654b678f4. 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/FR5P50901000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46bd1eb06429b859e909e60ddddcd9e6f64da71d0448cea335f15af10053e4b. 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/FR5P50901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce905b664e0b00c3ca911bd1072fde43c8f16a0b0db15b6cb43d60d161bb8e3e. 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/FR5P50901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2cbff7ab7ad32f9dae7f47c923c5ae180934f636d54aeaaed71a2e6c4e533d. 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/FR5P50901090.