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 0xfe89b1af501c13eafd0d97c2741f93f5ffecf6498200cfc8160ccdad675aab74. 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/9743d2dd-5b74-44eb-9124-fb55382c1cec.json and https://artists.proofprofile.net/proofs/artist/9743d2dd-5b74-44eb-9124-fb55382c1cec.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 0xf2092f9dfb4939be3f5bea67f770ae500c15c7ab6fa819186dfae1f032482cdb. 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/TCJPY2483518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0370cf99408f6ba36040f60ba51f71f621ad49bd43fc0a52ba81443659b1f. 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/TCJPY2483522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ed6b3ae69d380fef88ca992f733788ce2ed12e0ccad181fd520c4c6f3dac1e. 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/TCJPY2483528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c4cfd95364ad90c431af16cfb93a89bfa4bcab0810627cf4b511600efecd29. 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/TCJPY2483529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddafe990f69ad7bdc335d7ca691a6174011993607017f9cd65717a1cc0836c7. 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/TCJPY2483538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a1110b5c97facd5bc6eb0e7c11a917a439cac413d7c9ddff8b4dc77617a3a. 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/TCJPY2483540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeefe464c0557959bf196428219803f5abb5814590ea9d4f241cb8417dfd6304. 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/TCJPY2483542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78106505d21091aa4e78adade1b91c7b61c16f515e7eaca478c251263db51844. 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/TCJPY2483544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab781ccdf78a4678c1c90bca9a7f7e8abbb06f0cc1a217a0c87faea61670ffa. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCJPY2483511.
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 0xf895da0c2a43ee96a29d155df8c027df517869aae6343731ed63a3d4ab3604f1. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCJPY2483515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e020aef931c4a18fe9c7a58bcefd27c60cb4b890daf0144a2978da33984299. 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/TCJPY2483517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be4a38e5cd38c3d57286ed625eacf61129d3f79727e313f2b30f2b157f4b1c9. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/TCJPY2483525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9e0f9ac490eed5944a746d6634d5989e1a2ea52981d108ef832b5c72b2bd2c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCJPY2483541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123334a7d35826e5ad8d1347c948688554647d1a9a9950603120c5c0e2c242eb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCJPY2483545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878ba31f7b93e2c64ae7dd88e2d478d147086cad42d3f8daf7e8f84ef3923386. 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/JPU902401869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67d4292dc245b0358b26938896bc57e44148dd6caf723ca882347cf9d1180e6. 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/JPU902401870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e9479ce9cce03a30f8b7b2e0d342a5ec46d666568f3df3b718af555905819a. 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/JPU902401871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9801fbfc8b0fa039baceebe6efcfb3445eab2d52189e63dbe677f388a3380fec. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPU902401872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde48e460e089cf65cb592a32826b9c69cec265b75565794b51ef0f0ee9b85ecd. 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/TCJPX2307675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058294255c9e297839db7b669f1cf30449a33c4ba7edfb00043fbdc47b111a06. 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/TCJPX2307676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cf50e085d1e905c8f62b707580b71a490b45d88b99cfe75841c368e1ab84b0. 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/JPL542300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362f7f933636b5fcb4dd4ca3f8a1421c20362f96f4fed7afa7af1615c085878f. 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/JPL542300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d2c5c35206efef4bbfb1bb48c3969fb300d92cb9e75bfdc9a1efbcb141257. 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/TCJPV2377398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3032ffe61228d3ecd0c184ce47129be3888f2955a6c50f20c9f624c48e44d8e6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCJPV2377395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaa01e7e76a70b201678adcbeb0cb86e8417d7a2206cd26bc2311e3479d7f4d. 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/TCJPU2378654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351659d05d15f78f2ee7e2c4169ef9ec0399a06093678d03a70201be5143386f. 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/TCJPU2378659.