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 0x2f7eb491c144828480611a099e0fbea955c1d33b790b3a976f43fa44bc0097e0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0499b460-c0f7-40de-ae0d-ae0b2d275da9.json and https://artists.proofprofile.net/proofs/artist/0499b460-c0f7-40de-ae0d-ae0b2d275da9.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 0x76e8ca9ab3a261ae5397b432aaf63f13b6eab78e2082e1de07324bd198876aee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1D2125954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28acf9adb3fea9e39e77e53187f65a07d070e5d29dcaee0b22bfaff2420a3753. 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/RUA1D2233361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc151c7630c6c3af63a5208ae986a61b9f521ffe487d0ad5c1c20b88305bae72. 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/RUA1D2215275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b819013574f4b948b8eec33d35b46fca091a1fd3649fe8215fa7932c566804a. 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/TCAGY2379084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311a7662923c8e77c663cdcb142a4dc3abfc0fbb8a6781068135067e9d790097. 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/TCAHT2446714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf21b06021b6db99187f6d1fadeacfd5e64b8b86f5fa977fdd4641a13764405. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAHT2446742.
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 0x7f5dabe0f04dbe487aea8e126ab3b561ec4595d432c3291620fc1149fde6b9d2. 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/TCAHT2446759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ee8d6ca84ce822ccc071d906082c83c0458afe9d06a6be00b7feb878cfe289. 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/TCAHT2487017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7a7581ec4d48c71fb078bc9d28cecb5eaabbd6187eb09fa61756823d1ae7d6. 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/TCAHT2487023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c542cd48188c72d7fa23852ba5b988d61e98b7deda552457a20f206e451b2c0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAHT2487029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce56c9ac3096a5ca674756f5e15988bae31ea8413e7cf0c2a75c99f42acf7788. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAID2487030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4526e4962ae1eb5191f9321264ee5c36ca434acc7bfd7c70edb5739ce1f5cd0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CA5KR2486919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1d859378913be249fc5efe6ba025355a2c571bac88d1e4009915d2c2a6c3d9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:40Z), 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/CA5KR2486925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d7316d9caa6db3b9bd31a17cac0c9b69b4f922530fc58159a2f6c76d24af9. 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/CA5KR2491193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1061065ce7ebb29b9c21ab0e80f8a3ba8df224542a67c6975c3f45eabddca4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CA5KR2491194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d3a59eb3952f3702980c27ffcd0db0f5e9907f4bd89b15284038e8e05357f. 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/CA5KR2491195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a8f1a9970090493cff5f05e187682fe3f091d21189c9eb675284955af80d8e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:41Z), 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/CA5KR2493333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba6dfddcd1f6ac69f63c8a36e7c3594244f007f74404380ff4749fe79998d0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2494903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba19a8cd4bae345faebcc6bf113839325c3c543c55110978ab821d35705aea7e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2495294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972557566cc9f68df93a7140e5a4cb55c8a70735d3aa85f0dc088c02c577dc2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DE1ET2399261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15622a24cb218c5f5dc05f878ca3a6ba648a3cc7796781861bb3d0bca6241416. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAGT2506446.