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 0xea9e6c2fa72c3891442e0e32751f8d040bfad5cf48365ee402a14458384c0d99. 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/4b8268bb-d989-4d24-a1d4-c7d007c44e95.json and https://artists.proofprofile.net/proofs/artist/4b8268bb-d989-4d24-a1d4-c7d007c44e95.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 0xed0d9ac8af5ab8ce01e20483b32cb9512579a1b432c8086d9e29b059198351b0. 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/QZMEN2268330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccc015c3015bb5e6920c2192c4208311b91488be7046bccbfeb5520dc1b36be. 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/QZNWU2482280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe723257ae1176c50fe87b69c56f50de126115786e4987ab8bfafa969738fd300. 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/QZWFP2379231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd29de42d51c393a7834c0ce8b027434634f035607e0cf5bc28139c41e4e70. 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/QZNWY2398643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6af9b957bd4edac259ef9146e150908ba30c0ab33464a432799f9763e030a8. 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/QZNWU2210638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd732c75aee66f432557688ca87c56a2a3d29883da6f6e7672af4a90f3c592099. 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/QZHN42384498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0033b7174d82f77dc035570cfeb42a4ad054d7e9f43c87dd2a7d77402844bd. 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/QZK6Q2306569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b896237312608ca435e9219a7302182fdc7c698b9bbe2bdac7aa80fd80a945f. 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/QZK6H2325050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c6163a42b4ef13cbd4a5b8949e7aa9d6d06ae9297b25cf9fdf6bac4421ab8f. 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/QZTBE2329426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02248f5b7de531c2552b90e93f9b38172aef0292491cae2ecfa00548e3a2ad51. 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/QZMEQ2312908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b83d0bd9a9062fd810472138259d0ce03585e5a4624fa1fbc93f2922e807df4. 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/QZFYY2350736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3986aebcb1772503238c077c7115ccfac70237dd67d4248dc53d84f700afef01. 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/QZPLR2283468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a5eda597272868eb79ca6e91f582f413a56772719b1e703952ba13c948b61. 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/QZWFR2383520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9195521992ca475a31da67c7adc2b81bffd2f4465a090238c4ae9e5f6f453799. 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/QZK6G2429903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef952c0fcb5b4b1d076225083f143989700838ae3addc6e10de9f446963e36b. 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/QZHN72415698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64165372f9006c5c06323cc1cba8981097aae13b365bd4c93f9a98710293b0b. 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/GBMA22335949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283c1b89d3c0b7f1e3a00536b6399b40a41978672dd7fde0be2b2519c30bac2. 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/QZTB22338515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3378331fda34cde7be24bc8daa43a18eb6a4d6582a2e6456d13ed87db011099. 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/QZFZ72384119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad215f7daceea988cc4674caa4ee45723cfb5f17fd5b3cb5f9eded67f3c2cc2. 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/QZFZ32364807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1656e67bc6ab1e60ec85b93847877e686786a0a0f1025288e7bdf3aa79ea6e. 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/GX3Q92303348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6252eb30a4ab78bd7a480c5d03248dfcf2764a3c6d40cb241e745b670855fdde. 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/QZMEM2208234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad23f4d075cd93bdad68035a262ab32a61f516c03c1247a22c851ee4027cb1. 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/QZK6N2220987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec3d6b69429da76c33a239f0da351a5471d5c2dc5617c05f991c4df2589eaba. 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/QZFZ72243274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37afb805517ce978785a6debd06e4aaf97f75204fc223eb95ca0a4cf0da9aca0. 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/QZFZ61922544.