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 0xaa80789ec43ef44b47537e653f084527f5429fe6079f35f16c08ef993c38dc30. 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/f4c8c600-abbc-4dd7-8bbb-47c9030416c1.json and https://artists.proofprofile.net/proofs/artist/f4c8c600-abbc-4dd7-8bbb-47c9030416c1.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 0xe716865757556fc8dd1be659ba89eaded926021e11fc5afba9f35a9d7c78e0e8. 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/NLT2H2100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232ea734b8e4f634cefc72bcd5118068ea3210ddb401109795f15c88dec1aa8e. 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/NLT2H2200975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850308397babb4b01aa3e0797b91d290ee98f94461341769a0ddbdd4b8238f6a. 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/DERI31400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa94045a803104f2e20f718b7d526e8ea3766703bb584f596ec06daaab4efc4. 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/NLT2H2301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8ab00c632738a3635c03161b3fee32faea6d74da2c09601beedb230307f4fc. 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/NLT2H2200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef01c46b299ed4ccc7829ae032764583ff952b334e68a6a31e3b7d89f58a618b. 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/NLT2H2100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7574968f03345436fe51107ebcde870fc628c0e659bbb77061a6915eb1915bb7. 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/NLT2H2301092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c076f013f15691da51731503e2d6f048387789c03f4e63faed05b6716e456f. 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/NLT2H2400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec26be1abf3a51ece2bb3f916df0e76aa4248d1542b855c414fbe57ed3ac410. 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/DEPI82432064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83de857cec475da8f5fb25f5b5843503fc803a8b0dfbb8c7254635ba20e4166. 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/DEPI82412910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71437871014922da9a5d1baecf98c8a1fa6a4ed3fd456fe2ef30082068cc52f. 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/NLT2H2400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89433425c5c868c51849a0c0eca46149b2a468e03f8c110ef8eac9c80e29974. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b91a8c5cb12fd5908c49b4e7e637454b3454acb95810b317b76adab735b18b. 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/NLT2H2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20971e4b072495dc203c4ca41e3fd76c5d3b56627020c8b221430dade972615a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a93b3299e62ac8e2781c7ed038bf5e21c41e0102706e7c5dd5f9fa3ed0163ab. 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/NLT2H2300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d40c9eeea9df3c206f3010fcb7f51690227dc1b2ca3b18dd72afa43a28c768. 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/NLT2H2201031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4197ef19ac7ce353a1df7cf5a2383157b19fde897fbe18e4d9e5ea791332a44b. 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/NLT2H2200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd038c88875f7ccc803e794abf21dc7b42cdd70ee0b8ae77ae4dc3d3ca3a296. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NLT2H2200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744fe295210337078f225d0315b3294291cf37141ac4777f6f1a344963e49dd4. 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/NLT2H2200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9407c9fe2f4daee6c7ae923b364e3d3f5394f56c821a97e5a8ad2558d4b0e5eb. 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/NLT2H2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1533f0bb089c81df449cd64f2584a1cc9e3f1a5e01fc72c58b136ab6b516b. 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/NLT2H2200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d087c811959bed6a21cb503842133876964ba647e99ccc1b5efad266d75a59f. 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/NLT2H2200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983a04afbb74ad90ee4c0f6b3ee7e169b4b483b9dba47afcb788a9176887a299. 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/NLT2H2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462c34716faca626d7a5897a6ba305ac6c5f1576a50e2633d642bc002a50f29. 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/NLT2H2100806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510773e04bad6dabb9960750ceb6e55a950726966ba93e9bbdf025b550a32fd. 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/NLT2H2100805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aaa04b6d02af0e8b2a386be73fc0c65eb01ed15c3a21df461d19c47b761d3c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2100803.