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 0x310d6ca9076986dd7ac44b17acee868c02c977388a20d5c96ca3bba1302e1ffe. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6f5fab9-21df-4443-89d0-5b059c462d3b.json and https://artists.proofprofile.net/proofs/artist/d6f5fab9-21df-4443-89d0-5b059c462d3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chansons d'aujourd'hui pour les petits et les grands aussi !, vol. 1
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 0x63072c06f736274d319227bbdd7423203b4ada028c2d26b5733915f245e457ca. 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/FR8E71504170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362dbb568cd0202cf2316c36b3e3a14ef30009390199fd35ebe855d0a08b819. 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/FRZ029900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd648f5ce6522d5823e78f64c394dbce4804b639506f861de1f3790232b4657dc. 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/FRUM70801571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b0583b290a92246594e647eee598757541f29e4432508d9d3ce3e4d0aab80. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/FRUM70801575.
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 0xdd440a5ba0fd0326d697a61663a2e8abf2c4481bea55f5a4a35c45d21b539f01. 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/FRZ020480530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589a281ad1c3e374aea0658519b49d590bee15fdfb0fdbafa0220f4b24363a3f. 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/FRZ020480440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7eef4abedaa1b1e87c6521ac8652171d1ef81da5a7efe087522b94093b97ef. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRZ020480520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093de9913d3072017d373bfe31fea57f5ecdc675f1331b23acd22aa5b37f5b3a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRZ020480550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66420086ee3ead9d31abad23f734da5b4cecd97b7ecfbe79fe13410e3830d75. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ020480420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c176bd33a050e07ab68e5949c5dd4de6f1c4ca69462326259f5d1d3b6e0a96. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRZ020480590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc4641327d351777e140a8ddf35c852fe5d87c8973fc817a5813538fa72bbfd. 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/FRZ029601660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683ea408e202cbca9b710a65c4bf1d4c2deda2535ed26f3b5b09cdabb1478f4c. 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/FRZ029601680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13a72b1e14fde15944eb57574c32d2a5813892c4e336d3a78a559d47974fadc. 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/FRZ029601700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dd7c1241318e57387a2b2e7c87fabc44e00399ef39d66e1ea43cb8d9e216da. 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/FRZ029601720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827c8ed6c6c31a5bbd3f764c6dcec38d8aac5b0a2630186b6fd057bbc4ae9f71. 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/FRZ029601730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2584c64f3303452152ecd39ce277831519b09336cfcb3c7b2551f14fe733f6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ029601670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc0f4077cfcde45d56a1d43938c651b97b40be44e4c46c95947ed5a3a6c7694. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRZ029601710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f4d30b98458bdbd32efe0d194edd0ee3ab73fa6558249c3e7a8fb06478aea8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRZ029601740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31fa0c8d7c495d4041322e189cc0d35747141db7d8773f443fe2afe8c887cb2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRZ029601750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72dc2cbdfbd39f38f8b4da2e12bda457d7deae48423f145837f70ec7c1a7830. 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/ITG201606475.
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