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 0x29cdb7ceb338d4a28543cb148778ae31b0a2707943bf563733433805f15386d7. 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/3693210a-1d51-40ff-abff-b6510f3f568c.json and https://artists.proofprofile.net/proofs/artist/3693210a-1d51-40ff-abff-b6510f3f568c.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 0xe3d17986273d56b8a89082c0269f6d8a4aec6ae693dfbdd720c9511342791282. 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/FR3Y77600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e19a463640a20686375f20e8eff424ec6beaf76911a616b54f768206f190be. 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/FR3Y77600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dbba9c94d60f187a1a9c908ef72b88a8db73c4ea9a8febc93321af3574b191. 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/FR3Y77600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd655e5f0845f010c0a46ee3e8c47ef77b721bc150f4d1e3b4ea855193977496. 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/FR3Y77600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6376f5cafdf0759a2b572585570f877100882f7b535f7749c2532e2005e98. 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/FR3Y77600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eed115c10384e1a81433663f290240726f4ade125bc5ff44b3ebc2916e1df8. 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/FR3Y77600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5bfd27ee0e5d70f75b89c4381cd7096a2f2cb91012d9d93357abdb69b95cd8. 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/FR3Y77600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe8185ba2eaf8a1125049514e1ed41103d7eb1fb1b362de053a9487e4712959. 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/FR3Y77600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e9a3675bc6b1b2426c9b10dcdcb8ce27b11fbc6c01b4519c4eff1935e07f0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FR3Y77600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62b34e2be754c7ba45abb03839c447a42b0c888434baa40c2377020153adc1b. 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/FR3Y77600011.
Michel Fugain Et Le Big Bazar Numéro Trois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d492879d8a6abc7177029dc62b62ca52401613e374b4d3a43d492ef6809cc5. 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/FR3Y77500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad6e0402b446c9adddc2b2a2187bf877550e1120344f54bf649ed1d2686d6c0. 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/FR3Y77500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2131c8881aaecbe219bd89c635eaff9bd07270b91eb21d4ccb2169e5e7dce3dd. 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/FR3Y77500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f431d13f446bbe2d15ccbfb7ca83bfa3fdd1737a4b3d0c23147fa21e3e06e51. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FR3Y77500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a34f459b977dd341c6a9cbed57f3b98a2581b55bf0ef4be0163d90edb5a1fba. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR3Y77600008.
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 0x3b9bd5dd100c88522ffdef85210321c94310442f3de4182aab398f787e1e41e6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR3Y77500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376cb18ca16c3384a5f06959e1776cdd71e28f6708cde32c715b88372b4ab7a0. 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/FR3Y77500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65351d53410be74f7fa19e9b0bd68f14db54b8722b890a258675179c3742f62b. 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/FR3Y77500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab366ef2cb1ed833dd58596c2f851c654c373b097a724f5241f7c625f687040. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR3Y77500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6be7de6fd0a3fb8563ce4031c2be100cf3e9f9cc950fec3a8a76ab9dee0d60. 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/FR3Y77500009.