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 0x384b46954dd9af1b0d6577c254d068ea989df9ed4bdecf02411981704497838f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8017ff45-9cf0-4968-929f-5e7c00bad215.json and https://artists.proofprofile.net/proofs/artist/8017ff45-9cf0-4968-929f-5e7c00bad215.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 0x1fdef681a5a792f4c294d545ef4491ef500c7dab77ccc717390873d57e971205. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V81207995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ba742fd174bb5dccfb08eabdfaf5d7b1163f5b97234d69380b15e0b1facb5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:38Z), 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/FR6V81207806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06858a54a12350ed6aab0ddc05cf19ec82bb2ab43d8835e593dff66cb631a378. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR6V81207810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25e7b7de090a169e2c7c8e2c4afa24c6dc21a5343cb0f0a6a3fb36bd180bbd3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FR6V81207811.
On veut du rap - Bonus Track 2007 - Extrait de la compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7967652d6d43c2646c5b73b7d226f895dc31b4a69158d90ebfc0682ff393b7a7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:17Z), 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/FR6V81207812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6e3e50a992a3785d9116a72d82ea3687f32fdda4819266b4932bd13d2b187. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:38:48Z), 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/FR6V81207997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31fb00eddd45cd110c301bd33671cb090f292f083fdc36a27196112ea82b75. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR6V81208004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c05711c4db8086158848063e55e5a4e8730435b091488f0f78a27b056b467. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:48Z), 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/FR6V81208007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2181095dda8277056d42abadb51dcacf369632876a368a13806edf51e57ffcce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V81208008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048791f9de2265e6a2a156fb23b4f0449d7f992f97d7393c43b74d470299a06. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR6V81208009.
Enfants du hip-hop (Appelle-moi MC, vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5fc85defc56dd7e3dc7953ded9cceee2d3a059c722b42f83c3329b0ab5741d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX202003840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1d0f3cb727278c65e3f147f0f3d94f204667828edcd3f1b1adc3aaff97b70. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX202003841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc540dcba65e0b87d6327d3c7e2a3b165b7e53a091cc5953581c9496a4fec0e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX202003843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ba742fd174bb5dccfb08eabdfaf5d7b1163f5b97234d69380b15e0b1facb5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:49:46Z), 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/FR6V81207806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6e3e50a992a3785d9116a72d82ea3687f32fdda4819266b4932bd13d2b187. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:17Z), 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/FR6V81207997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858470c1550ce206fc2026aed4913504ba3d02f7ac8e93f70a0efc54d4b5cf30. 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/FR10S1508403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3ede8883739e0bc9130b5f2545a41030886e8d81abf53d459c12e850d7835b. 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/FRPI32200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec2d1dbcb33dabcdfa175a5574a23d8a98ff1d594f4ae412375006de0f75ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR5R00901924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ddb9e2515c2005877be33aa8463190f26b41ddd80dc4c01472876259874b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR5IW1300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735692702a13676d917dd843a9cc8418b4764eadeaaf4a8aa8956e6fad178dc2. 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/FR2X41544753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7459d707591286e73e8be8ae4058eee58f661182c852d35b7902b1e661c1b84b. 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/FRPI32400616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec909cafe61a4b8237270a159d6249c18ec80e42a166dda1a69db5ea5ba3d9b0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR5R00905685.
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