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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 0x3af32eb529a67c7a2b932c0c378c325e518a7089a598f3f4b8bdd67e9aa50148. 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/72965650-c098-49cf-8f5b-d9ea8ffc9059.json and https://artists.proofprofile.net/proofs/artist/72965650-c098-49cf-8f5b-d9ea8ffc9059.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 0xfa327b46d116a410d069c2fc63acd3453789247fb37d544a797e2962a9ab64ee. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DEE861501092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32a0ce7a04dcd07b370ff87f5d2af9d48ab6336eb95e079d89aa1c9a500c832. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR10S1466553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1a957d8299d48a2fb9b918fc87a8df2c6f238baa3aee2eeaf19ded8f39436. 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/DEE861500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa3f1af7d1a95e5ad1b4699191faafae40f2def85e8352292c00a84e39eb353. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/DETO31700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f404133860c388f26cd5b012f0034e12d607e758c053c2bc737e3cebe70fd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/DETO31700147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e076d49ab1c1f182840f42280d30445de751b812fcbe30e03b2363b3ee356. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DETO31700148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3603726e2b3baf0169c9b30393d8890031c4b64d2ad684327934bf94be0d8a2f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DETO31700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264f3173fedbc36df0ae3b2f142a2ede831fade56c1aa7169b87424f851b796. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEE861600818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0d9968f3fc8a500c3b9e9d37e57380703093f5d5beafeca46131e68ebc375d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DETO31700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9346b572e98a8d8140f09c4d54ebd216cc8a0560c4c4cdd37734bf8ea19b6511. 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/DETO31700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e076d49ab1c1f182840f42280d30445de751b812fcbe30e03b2363b3ee356. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DETO31700148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d5a3a84bca193d521f78aac9d7a82ea5aa2e7ca4c512b22f5c95e272c79786. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DETO32200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b890f8b33eee1b496f4fbc655cb3434f18363ad04f5cded0d7ac3f1e216e4e4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DETO31900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc1679fae74129875d11fb425e99e158cca564778b6e6e76e54b96a8d37501d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DETO32000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0226267b133d51f47d4014df8a5136e5be98a8c06def4e3d3e6a806015d1d6e9. 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/GBEWA1904139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50211735ead31a0f883178af6f474641d9705dddf99df2fdd9f807392181bfbf. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBEWA2202520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595586af24b46f877a177cceddb0bfc7db0178cf1e75cf4da2665df1f68750ba. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBEWA2202524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ad6439d23cd059caa95cd4cde2f4fcef4d9527364caff0fe01db96d04c5c25. 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/GBEWA2103555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50211735ead31a0f883178af6f474641d9705dddf99df2fdd9f807392181bfbf. 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/GBEWA2202520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595586af24b46f877a177cceddb0bfc7db0178cf1e75cf4da2665df1f68750ba. 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/GBEWA2202524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818041fcedfee6646684db1ce8faa3349ce86d9d7657ac370f82c0232e140e83. 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/GBEWA2104435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2985717e4e25e5b133edec576be0b43259acecc3a08661a7deb1154e84f335ed. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBEWA2200294.