Tai chi is a Chinese martial art. Initially created for combat and self-defense, for most practitioners it has evolved into an exercise, a relaxation technique, and a sport. As an exercise and relaxat
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 0xc26878c0f0d2c895ca3c56f54beda41f36fcf19cd141b9faf49b5114a819db1c. 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/1320e50c-9e1e-4420-a9e0-9eda9bffdb68.json and https://artists.proofprofile.net/proofs/artist/1320e50c-9e1e-4420-a9e0-9eda9bffdb68.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 0xece6885377f3f7a37da11d639c567649db125d6d44a2a0d6998ce73a03bcffa8. 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/HKG079900363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ecd0b8b35b49a0ffcd83bddea98b2a6c6f415bb786678e61c8e0c79da5786a. 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/HKG079900364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b080f23421a6285317b27a634f80e2a8b4b6a0e0f6cf00cd650b488112d928e. 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/HKG079900366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b40dd713bc663e60ea2254c45694b485fdae0818ae2f524cf94c4bb494325ea. 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/HKG079900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19021a34d003a7150d2a06a1e13593734e4efde366e40f332c3f7beaa7f609cd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKG079900369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808b27fe91c3270c3fb65b3cb377a44e3653ff609cb63e6a1114fa787e0db0bb. 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/HKG079900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0eb75f9fc2f1b4dc8968f9fbcd2266e35e3a049ec136c581b50469069ef583. 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/HKG079900371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4efef8dd3b401f82aa0651aacd9b95ad8815e89e28497512b17f44d0f57e0d. 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/HKG079900372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e80fe242537323b5d6cbc8b9ce0a5541939c1eaac3d9b749f89ed4550680b. 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/HKG079900373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad47e95d46ca02d97fd16f848e7029aed3bccb8de245a0d1b896143afb0fd197. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/HKG079900374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fbb1a20ea8ad6215706de210824c0a4268982fde444792041d870cf8ea4d3d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKG079900375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f591984e9c66cf0a9ae6ed9cf36b24240761caf0837123c2ac186baed0f63. 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/HKI499223103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26858d1669fd718c97577e8709798d8cdd202d941b140a667d77c2e5fecc3174. 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/HKG079900377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8ba6e1ffdb7c57d00cd7146bf33014d87b5ceafc355d90480a4e25d4ae5c74. 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/HKI499223102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efc0435cb25037864035a9c1bc60489154856d16829f24c925dea7bb77fff21. 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/HKI499123101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efc0435cb25037864035a9c1bc60489154856d16829f24c925dea7bb77fff21. 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/HKI499123101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f591984e9c66cf0a9ae6ed9cf36b24240761caf0837123c2ac186baed0f63. 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/HKI499223103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98c7fca08861e7cb024a2bc81c82c075e2ab4e49cdad8eb276f300b1c07ad9f. 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/HKI498923103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f591984e9c66cf0a9ae6ed9cf36b24240761caf0837123c2ac186baed0f63. 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/HKI499223103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8ba6e1ffdb7c57d00cd7146bf33014d87b5ceafc355d90480a4e25d4ae5c74. 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/HKI499223102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab841dfdc6622b6d89715cba8074bcda9a3cf3768c19bbe30ba00ec258cd52. 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/HKI499323109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab841dfdc6622b6d89715cba8074bcda9a3cf3768c19bbe30ba00ec258cd52. 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/HKI499323109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a7ffdb65413fd6e8ab4a5aec46567def7551b168377d8f0b8f2927d1fa94a6. 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/HKI491500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc582437494298c8dc817c7dc0fa918d3690b61e28333efa322915bba499313eb. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/HKG070490020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dbea5e2fafffaaf7853a05b9a0893cf01bd92e0109f2a7fffb30007f3ce37. 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/HKI498723101.