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 0x42871e52b5e2fb21b775f204ab7a26a1c3cb47d2dc37abd463e74aad721e5893. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4075f73-43f4-47b5-96ad-b8e290ef7353.json and https://artists.proofprofile.net/proofs/artist/a4075f73-43f4-47b5-96ad-b8e290ef7353.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 0x674aed9f6142f1678216590a456f60b875aa07b25b1281ae2bdd206c846fa468. 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/DEA622401442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6bc46646a4f6f79a482029f0242aa760a18414009242692a7fafc18f4ddcf1. 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/DEA622302728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bfef7a0289edb83306cef8515e9e73d1ff74d9ee8fc2c7bb8a7f005d749d73. 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/DEA622301217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5d04e752aa1d3913a87dbfe80b844061a1e6bad819a3fcdd13d84574ad8074. 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/DEA622300746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132d1ada1cf3df92d41cfd73a813b668ffe860780c1550b71b481e921951ae3. 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/USWB12306496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f9567ab9a19ac451bed471e1b460049aa02fde276d13987f74ac3e8ff6c3e. 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/ZA34K2301288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25316909ff57eb51f6b918107de4a03e901377fcd7622acc0fc53f2c62268eab. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USWB12306574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3afa59fedb71d81bc1910814080a155cf61c27ea97a72d9f83c91abb52706a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAYE2301191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbca13d37470c344c32b8ddfa3e4a749a35310f5b4f5078daa1e92bcc514ecca. 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/USAT22222515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10141eeb2b655a08d2ee6806ea6ef224dc70899a867ba55c66586779596a6d9e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T19:07:08Z), 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/GBCRL1100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bd899594ae122718c5f35cab3af64023125193e70d33ec35345e93ae89fd1d. 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/GBAYE0800256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aea2eabfacdfecc350b9ecbe2399340ef1882ed73a53f41f836662bfff51f8. 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/US8391802178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fc5c88a9151dad31be2a27547b60d58b9af4180bb06fa2bcb426c7409cb891. 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/USAT22306483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb157c2e4ecd07e2092beaef8d99f85ea33152d6d728604ce6d3c077737faf9. 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/USRE19600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f6b5317ce68cf95918c1bb33c4972447676cd3121f74642d01cfa4929f8876. 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/USAT21403993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e2fc0ee338c399333f760ec18c17ccc1091d136d33c174ddfae0e6dc4f959b. 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/DEA622300748.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a931da72d3b86afa388f0c6589fa4b1ac24af6cc4101d1a0de0d8dd16a188. 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/USAT22221554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a931da72d3b86afa388f0c6589fa4b1ac24af6cc4101d1a0de0d8dd16a188. 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/USAT22221554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de0a7c94c8f46989a283465b38bca484a9c8d6f4d398acbca06a13a5d43b4e. 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/GBAHS2201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb2cad506cf31f1b1175558253dab129379f911acfab839972ef02bb02f639c. 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/DEA622403098.
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