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 0xcb1bba869c3fa1f08f52f238f80df4a214b82df04d30032eea488cb2d7a3daf6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1f3f686-568e-47af-98b9-29e781a186a9.json and https://artists.proofprofile.net/proofs/artist/d1f3f686-568e-47af-98b9-29e781a186a9.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 0xde88d0be0e64d66b7919aecffce1bb16362384a308dd92c8b6a52316c122f11b. 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/QZGLM2501569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe202fc476acedc018effaca66bd55054090e72c6a895c7d23b51bab02bed183f. 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/QZGLM2501570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a049db94d6f82b00c2a90f4bb32685004678641186ec5d8cf1eb169460b50. 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/QZGLM2501571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8451cd5ff8d468f92bbe0decf4f563d83e9e1b4ef002312f95cf7bb8ab42ed87. 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/QZGLM2501572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72344e3bfd8491159933562d3b97fcb0c68bcc5b4d227707f232d25172b8e6cd. 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/QZGLM2501573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc368a696a7d94a4f47e54459422bfaa91aeb67c71dced38d18642ab1e6ce40. 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/QZGLM2501574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91198d3c4d144eb5090ba6d63730c9fb85a155af9fed709a48c0dd885d734934. 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/QZGLM2501575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ec7f8951d5010fbb017383e631d98d3a58eb88726254f023c1644044596276. 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/QZGLM2501576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ec05ef1bc7f488259ed5c8f61ec2204e3049d6a569b1403f76d6255bd2ed5. 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/QZGLM2501577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde01a952687f4c74c5d1500e726c2bcbd7cb7d618a4db901f78dc278dd40ca9. 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/QZGLM2501578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9f6556d290bde9cd4b4f2d50dcf14383fceb77b2344ab26cda4d7d281e58a5. 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/QZGLM2501579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9844daa4d61f6107a4254542acb1c85d8c3171dacbedcc155cd6226183f580. 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/QZGLM2501580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73c1065685c4527282ea4394aad709b64028f0d245e30f111f701d43ee852d7. 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/USL4R2121282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2560c1664ea866110a40ff47208606b5109a13fa940423d036a805ba50470966. 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/QZMZ92332151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0de10747445ac0ad31ea338a47f014c24826e1c75fa20fcecf8ac81f27f364e. 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/QZGLM2314222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb475cb25b388e8b3901ca40fd90aa441c72db141254428f231047604be762266. 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/QZGLM2314223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed82335c02d5dea3f97516ead29ef5a15b0f171ec02815d947cf968ad443771b. 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/QZGLM2314224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342d0c8bc66f672f09af5f977fd194e60ab7563216f09d33d5f3a7a55cb902c. 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/QZGLM2314225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d57e26becc4ac34229224a600504417d0ef0beaf69b58d14642d930bc863b. 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/QZGLM2314226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4783fab19441d82e0ff217c01e7025b912117fe64c9f3c202155e8685ac048a0. 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/QZGLM2314227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71656394348d4cb7527ce77e6e31c1554e546baa668df25cca61101505b5e013. 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/QZGLM2314228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ed8d9684fdd6a802896c4699e9ad3468f15aa45fd211462a31346c5314465. 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/QZGLM2314229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50fa3c91065d8fc064eeec9a2c619dec157cd58b153e9f187a42b9081d10643. 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/QZGLM2314230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2932fb8a532021970850724fdbaeee01b66808785e7bd15b6e3f0437ceb51a3. 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/QZGLM2314231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51848041e0264f015837fce4a8abd2a9a2ba21804d4fab8530d3363d96c4f402. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:08:01Z), 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/QZNJY2169497.
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 0x9ed075520808c844f734d9c4b16a8ff29086ab5d29a9d0705c3174c455bb50ba. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZNJY2169501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19622c7697bfc79fd0fd0488877f07108f135a5fc258d2dda5e7e5e9bd119938. 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/USHM81911925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef84a6a3c762e071300eaa9420181a548b17ce6bd1d6adb2253e01b37afbc9f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX282033117.