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 0x96e8d40060b43ce524f759379beb4775ea1ee74f8958982782cd3e1a0a3c2e8f. 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/f3195069-0c1e-40db-9c51-70574871fed9.json and https://artists.proofprofile.net/proofs/artist/f3195069-0c1e-40db-9c51-70574871fed9.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 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 0x70ce9a714dc580799e15b58626620bf328e7fd1094746fb8e2e093f907b77233. 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/FRZ052000565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9d956f18ae1b394189e2fe48eda17ccf0c9457a2cca8aa394e6176ada13451. 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/FRZ052000566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4271d6ae05beee8c5f4b006c082d0afecafb1388d48636abbaa0d061f9d5ea92. 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/FRZ052000574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f21fe6a557ff6641ccc6897d1994abd61c77ea32c155acf79c265cfacf7897b. 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/FRZ052000567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21052f5a40a1e012585037013c8d686fca69ceedd5718a4700c869e1014a40b. 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/FRZ052000568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd74813009d1fd1c30b7abc2c3ce70545beef05c3af4dde1bd6bc164b65b9bc6. 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/FRZ052000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec83161cfd947b3adfadabf3f8b75d91eb5a8b2babc00c70ae41c71ed6a7755a. 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/FRZ052000570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a929424555cdecdedfea6f845bb8d857cc6bafeeda4b91ccea587f44934f5d. 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/FRZ052000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577575efd3291830187ac1500b6ae0892ee8701220e822503af6de6215ec0141. 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/FRZ052000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e37344dbbe116e43dfe888bccf030c71033f611a532a022f5251c16975595f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:22Z), 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/FRZ052000573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddbab38582eb483907736e78a10f1ca1b1ec0233872126c5793ac1c41cab507. 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/FRZ052200356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58842db1c641311b2d6b53572c692b8da4fed4168459aaac36ebb791f0042056. 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/FRZ052200249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c68144d79cf668adf7276ab9e1f5d743103b6666ca7eb4365b5619e8405406. 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/FRZ052200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1125cdd96b051888ffaac8ac44c117cd423eaf704229ae1cad0c8f20770c4e3. 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/FRZ051800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6aed376ffaaceaf4d7d257ea1e3e13f92274305e3bf97e266182e997bea0c9. 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/FRZ051800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fb53faebfdc419f9026d554f1653ebc67915b88f4a479c06d0d5c6dfc5d85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ051800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf380cd9d0e2e6cfdb87624ae084cf69d6c88ff240e53c6955a6b7f5155d57b6b. 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/FRZ051800509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09935181e874e7b3964f204e38af8d22b79004cb0f1f59381fc99abea9b100f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ051800654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1671677c2eaadb6af69eee92fe4de601abe98711fccc1341429ce431a6af0e7. 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/FRZ051800655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb666c74000e611c027586294be9e6cf93f145aebaa4b35073852341f3de373ca. 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/FRZ051800656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06429c84a98a6e24510e8aa228ca3bbea72b55d4d45662d266f63749cc84a1ca. 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/FRZ051800657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6539d448be9e568e7af9525e596e1f92d03c6724aa594b9fe050cc1b0bdedc6. 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/FRZ051800658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e832e3ce8f27b9841bc64482ec817af2c80146e5e5ba4d63e7f08d0f6e42bc. 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/FRZ051800659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabed0b9228c74e226c1a8e3e411ad6cb7aa2c0d65515defc34d617f9fd4bc63. 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/FR1Z41600169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a832c80d0230c1feb5e539c0252994d8a6d73d1f76ebfde6805418612278f3f. 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/FR1Z41600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a52fbc133e562e0a3757e187d9d99594c3d56d18a499956a67a32dc17ee2f0. 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/FR1Z41600172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f1d5a567664f939e5c82e87a29395dd7cdc1f8740ed2f7f23fe65111b3290. 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/FR1Z41600173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9433ce996cecc897ba22210dcdb05d8b9f885e28cc24cfbf0956a6a7b91ccbb6. 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/FR1Z41600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b51c8b33cae3b8e7e03da53162f40957f737ea736692f53ac4da9b42bdd8d. 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/FR1Z41600175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c826b8c608b928abbaad7b023bf1d251fbedde8c8f667ce2023f3e3bfe927f. 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/FR1Z41600176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb503c01de082a0175a2e6837d61682b8e87a8a51de69cb01cf27ef5d4d44037f. 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/FR1Z41600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58842db1c641311b2d6b53572c692b8da4fed4168459aaac36ebb791f0042056. 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/FRZ052200249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c68144d79cf668adf7276ab9e1f5d743103b6666ca7eb4365b5619e8405406. 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/FRZ052200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fb53faebfdc419f9026d554f1653ebc67915b88f4a479c06d0d5c6dfc5d85. 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/FRZ051800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a0359de15dd672f4c23da11693745f8b48931cd4899ad673ac7395beacf9ab. 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/QM6MZ2013783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc137a899e72a1fb16c6dbc93b39de092faa2105216cabd8222fc65b4c2b606. 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/QM6MZ2013814.
La chanson française, au calme (Une certaine approche de la variété)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd68bb69eb270f5d2fafb29fa1148f7f61424a731b6078b85cf0dc3197f7140. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190126810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983752ce250ccb3977a7b97fc4c1d96946d29a571df87815cd73bda4eb5d456d. 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/FRZ052500158.