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 0xf7e0a93b7455e1d86b72a2f2231871c774f7a0a469bb281c329e6a002ae0016f. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55a4ac84-8fca-460c-9277-96e325295144.json and https://artists.proofprofile.net/proofs/artist/55a4ac84-8fca-460c-9277-96e325295144.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 0x2b5fe56ed30947c2735cd82075e8c3761e4dadae22ba4b642a9c1187daa0f645. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ARA0P2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ff77105c29d25d84b5128ccafe9eaada1398770b7c090a10fd1a3e69c94d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARA0P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe78929355fc1573a7f83b18d8c5380d992c7600545bf152e04577c2c2aa1f6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:51Z), 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/ARA0P2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e5cc0a067dfaa50de4d4a8504cd0059fb49fe5ec3e9e3618d4c7bee8cb273b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ARA0P2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f970f77dcdfcaf2e0122661f8bc7a7bf1ed7dac800f64d4821da9c91b59ccf. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:50:42Z), 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/ARA0P2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cd6f6962a7111982d64564c2f9261be6aeb95037d74ee2fab2145558ba72a8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:25:01Z), 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/ARA0P2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e49588ccca3390e5422b23ee11b72202484a0cc7f9f46c0b67d858ca536af1c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ARA0P2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5545480596363e7cf0f4a825659556b4cda3249cc4bc6d53630dedde89e27. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARA0P2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e9e83dc8c140f3b6af240e855526841501c074ec7573dc3318d90ce1ecd09. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ARA0P2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a90d7246b64c8e79710b9096468cdfbc6fa6ce9e74c9f99a086c57a96093a97. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:13:59Z), 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/ARA0P2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8d89ad3e044d39dbe3040fc76d1f7655ad3bca30cdc7d03908cffb1cae822. 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/ARA0P2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891195487df73d79925f1dadc3e0be3b544de8008e68f42f2016a3b0991e7d25. 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/QM7281886576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75fc48ddb21a737cef4f10dbaaecd2bf823d8af5aaae3f9bf6f1ecb2b5363bd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARP7T2200108.
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 0xe558dd8d2cb5df451b7d438d40f40c886571c13090fec421b47e0be5f7601374. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ARF051800121.