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 0x61766b50fffa154c007538f8ac4ae8326cc444dcdfd43b4096d6430ddf9ab906. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f9e6764-8227-4de9-9765-b66a83ce63ae.json and https://artists.proofprofile.net/proofs/artist/0f9e6764-8227-4de9-9765-b66a83ce63ae.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 0xba65014e6af54f5146d6aa4b03d1498bf745ec2b103156586d7bdc1c5d5d77be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARHXW2302591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da17d0a6c0051b59b306e4483c44cbcfe7918f49dfe5f9cc4e581568fb88263. 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/ARHXW2204141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489f6ebaadef092c1e25671eed4bb4449e202d437f51bcb8ba86bca72bdaddc6. 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/ARHJP2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c4eccf81bf63739c7322a1c012994b215a2e8dbdfcea55cfa217a76369d023. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARHJP2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e51a15e70f6e2b2c5878dcf9ca885937952874e10323d85c9072d0576cfa23. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARHJP2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc50bd77bc67597c6158296852ae9af0c6547e5cbf8cb40aebedf932053dc128. 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/ARHJP2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03254a11cae4d32fd85e37ddd9b4581ac0338f6b035558eec1c901fb77865d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARHXW2302593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6b29872656d3a0b82b6af678cd1a0bfade8230926499c47a3b0b4e53658d39. 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/ARHXW2302592.
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 0xc24759c6fbb58d13f103327173daa6e7d95727afe96c6083e9d9ab9458203c99. 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/ARHXW2302594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b3155d88453360b6af9276804c6d6ff658f410ee4915398d2a7f28c9fa1de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARHJP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e1ab6383219beb78fe6cddd585b18016dab19500366d99932ee44297bfc0e. 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/ARHJP1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4ae84647102a0c7cd125c43369aab0d9fe84980ee4b63a43f655f9a7e721b6. 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/ARHJP1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad132f540fa0a568dc23bc48aacbb2ce5834da4f873ae1f44efd723b4952c78. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARHJP1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5711db49f6d9905db8e9b61a1f3b7b131362362199fb69b76a31db0e88fbf0d. 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/ARHJP1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7c1a4cda2f73b7706aa07a15359106c8aae6c8839d9534e6a02632cc898be9. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ARHJP1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799463e70c54e64133bd5b4b45503a5fc997bb0959de6914a5ce1013f7938ab0. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ARHJP1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0b69cc07fcd3fbd1f87c51249dc1a58e363fefabaeebca87fc0ac98d1d68db. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ARHJP1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110a9cfa544e6f5436988b4a61ee043ef4292e69e25234bc09e7ef16541f86b. 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/ARHJP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7cbc64da4e4266332f6af452ed2bcb660ee60e95293014825cc8ef5026a71b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARHJP1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2745feb2a15f3453ba987df031b36b66292ba7e106b70f0913e1db5cd990bd. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ARHJP1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa4206197a0c1b36492b49eedf60cbc0883d3938e4dcfc6a1a9a5a9a46053e. 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/GBSMU2874768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db8e42432764ae42bd70bb6f3955c257c38ce45cc3b968cb4c90b3128f66900. 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/GBSMU2874769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ad63a0322d497c324ce79013564f8cc300a959f0bd6bd09b6b36145d34fddf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU2874773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261c6e29818c2254872edec430cbf9642fb89a32a4ef2d38838d64240881ab0. 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/GBSMU2874777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eba706a80df318fbfc3d2fc3d3efa5036878008726950f9e17553a25b4a745. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBSMU2874774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cd4b7c740a7cb143cfd4f0569ace8b111e1a5cffff5e7e2fb4d7bd08b12a68. 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/GBSMU2874776.