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 0xdbff941ea96d2255561fdd88da38d5318abf94c6fdda57f3eac36aa2fc0203a9. 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/e8d0d3f5-baf2-4663-95de-0ea2abb2fe86.json and https://artists.proofprofile.net/proofs/artist/e8d0d3f5-baf2-4663-95de-0ea2abb2fe86.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 0xd3fe80b47616ce9f14163c521270b767c84c6cd32052a2d96dd6b215a2ffde4a. 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/UKRVV1900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78c199bba063b4fdb915bca5573254476498e9dfbbee244f8f6f3b4b4c6b162. 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/NLE802200547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cb1912f68a07115ecd65900c82ef6b67be1c3bee34b7a55db3546696e0df2c. 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/NLE802200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a287b152c6ddda83df4a49dc99753005fd350549f0b88c96393a7c6296d5ae0. 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/NLE802200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875fd8e6ec189607e92fea04a0ceae9418379dc2682138a57994b5fcca9cca18. 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/NLS762200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed6c78a63dbaacf7133280d83606b5c6f3b7e3d3d08d0500e6fd0f03efc6929. 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/UKRVV1900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a05c6f1a55af4a3731a4bff978cc5e23acd2dcd5ed9b1397b8f28158d32ce62. 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/UKRVV1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601590a2e50c6291e1a8faa06ddd3b4c763203c65ec5f6f668235eb43a55c6ef. 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/NLS762100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107c0364e204c79666aba3d30a83e77fe233ea34bb134296bed4eaba39011b79. 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/NLS242100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20be9a4ad3d78dc1b9358f58c05327288053d8b8f4b8ce855cf135cc9c32a3c1. 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/NLS762100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af04453a1c4a2779ee40b23fcb7aa00fff65f0a33a4abcf58a352355f695f0f. 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/NLS762100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd267bb6323453fc8066694047de6c588b98bb3976145ad8471e9933e5fad722. 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/NLS762000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7e020534091e40a71022c3ce7afb24b1bb1bac0f86f78e7cb7db3886e2a705. 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/NLS762000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3cd5d88f096db56fe371a244d160b3dd072a8f7cd5f2dfb143661704323e97. 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/NLS761900775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25974a894d65de4ba917719f8e5152712c73ac7f7c7962ee828caf6a6fcbcf0. 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/NLD681903047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8739c7bcb24473077f91bb487761a385a67c636cc72e1a77c40623462f045b. 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/NLD681903048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08664e4725714f6811b243b2237312b03b9a75599f49aa41cdec61c1af338bf. 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/NLS761900630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1308019ec1012f0e4e056efca36413b8b2d5d37109c5c849ce9799f998cd49e. 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/NLS761900533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d13899c5244461f33e100c6d2026a15cd8b7b0b9a90b1a4da0849ea46502bac. 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/NLS761900503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ea9ebf2db12651fe514b4a8187cf2ad88dfa0b68f51fd591e348fd7c19f5c. 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/NLS761900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab357741965ce94c596537a967112a8f872c653422ed3fe8ce4148e845d9a8. 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/NLS761800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7db859eec9f15c19316dcd55002b5ab5acede3e6f6e3479a01c8739ee86878e. 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/NLS761800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6695beea6e8e0efb7e37ffc900370f6c87de27a57121b31e806ce77008b4f11b. 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/NLS761800188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e474892f0a4ed9151de46950f4893f9134706f49135796d1fb7fc3817b96e6. 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/NLS761800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9058d733934a1b1e8c5ca00e4d7743b23dd938f95e330b7525c91963274ed4d. 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/NLS761800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf294888b1cb4265309a92194f478381f541f64ed6152876c990f53ccc53d1397. 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/NLS761700190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e76de1a59d5c77b3a5f3e176530e18e508fa3426ae20e5267aa945098aa29. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLS761700192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe4019907af65dfa7da7cba9d96f2753ce47b03d2af01c2bebb19512c04955. 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/NLS241601979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc3760f3f0c56af696407789fcf351e68c8eb7ba21b7573315cdb0f971f113f. 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/BEB681600333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1308019ec1012f0e4e056efca36413b8b2d5d37109c5c849ce9799f998cd49e. 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/NLS761900533.