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 0x4d7f34474745b8eece3b5bcd79c5758fd0e897063a8ce1334816893c6cb39415. 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/72441455-06a3-4e86-9390-4ea70d6ac372.json and https://artists.proofprofile.net/proofs/artist/72441455-06a3-4e86-9390-4ea70d6ac372.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 0x42ba056e5f53b480b46b4d20b3d5fdfca988f6f663afd811fc3d24f522f71e54. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US78T0506484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a890515eea707459f1e4ae08274030830407bb5887174bb8dc70eccb5489613. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USDBB0990528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8add9231fd90612a5f5eaf0b24974e12285bf75b27afce04111cd25031c25eda. 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/USDBB0990529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea7b3c009b09437c597ba608d178287580640dc65aafe3981bd6b2dceffc8f5. 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/US78T0506488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ab3726f07b4dcf26c2448f06bfd90e1efa44514ab02b8b8d54c572d364ae8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDBB0990531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275ee20f0fae2f8bb148f7c36379b48539c47d2877cd785031243670cd37cfd5. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USDBB0990532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ad3c0636a2d1796cad633b4cb63b40cdbeb014c9775d7b89078d441a45615a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDBB0990533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a699ca8b3cf4209efdf6df473788d032f57a10f3a198a0c5c2cccf6b3a2d7e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDBB0990535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df5eb32bac51d42d2ee1f1b98af2cc7d01d9cf6cc2bc5c68039c3ac3feb5e92. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US78T0506494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b3ac9ddea5e940480461f34dfe03d5cd3dcb859ceccd7371e2939a2b52f298. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US78T0506495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607967a6bba2a35611d9b75b111d03e121c46a1eedef97f3a2106333d3e39e65. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US78T0506496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c77b44703aed1afda21cdd14e99b58190c35101afe67900c71cf757f6699b3f. 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/US78T0506921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62efd53f96a802a156c9267a3071b34ccad9f6f940577bcbd5f291b9259b4e84. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US78T0506922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcab4bdbb17411fbe2f90c5dae3efdc2545590a78ffbaac4c97280d39970b2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US78T0506923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b850a6e9ce200c4295c38ba2ef9c5f6fdef7821f0894feafc5a09dc70522581. 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/US78T0506924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199cb8626170109962efd7244ddf7f7489ce9337cf229f5545ee280a4b2d31e5. 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/US78T0506925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03288323caf19759b6d477862558ae780e4aa176ad93614d8d99b1e61cb47fb0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US78T0505119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aeb042e55de89c5809a3b81be4744f08ebcc5768974da2693814e9fa6f7255. 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/USDBB0990269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf623a187ef60b31da82cc8d6ed22e1ebe575c3c92c25de12b7ef5ac9c269a9af. 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/US78T0506928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd401abed5b83ba1301285e86d53218fc3fcc683c2ea2ce9a57b2889e5ff4381. 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/US78T0506929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e4fb2259478c26ef3063b987f1149e83353b8b1015889fbf6b53d4a1c73920. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/US78T0506930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5395f3d84fad09f5454cc5c32ffae06509b0c5d842cf851f1d031c0ff0259c. 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/US78T0506932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e135de756dac8fb3978d3d949d331e056a26a73c06035111e6fee5d93443c2f. 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/US78T0506933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3ef6efd21c0595dc95ab2f359ff10d61aef008e5c711977cb08491b364ee6. 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/US78T0506934.