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 0x3f5eb2822df62bcfce9f53588e0dc35de96f5502a00105b28a28fe2452e3474f. 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/e88c12d0-cfbb-449d-943d-bc91532851dc.json and https://artists.proofprofile.net/proofs/artist/e88c12d0-cfbb-449d-943d-bc91532851dc.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 0xc0b444299e1e4e1d23855ce5bac3c69677a4b051c025c3987c3fd588e94c02f4. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:47:16Z), 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/PLC071109003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9557edd45d927bec8eee9fa43fac56d0aec0e031a883cbaa0c2e78c1d9445e28. 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/PLC071307001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d1c748d18eae4681c787e9877cdcabdaefe6982d2487ce65d3f36fcee22e06. 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/PLC071307002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3c710df2045b16795de755b412c25da38877f9167d4144c6cae1b5087f71c. 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/PLC071307003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70aa2340dc560f0762c257115a46ad587f59425ebff43090983efa4987d30a1. 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/PLC071307019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eba3e52a304a51736d2cf823963cef145708b42f2ccc61c0897911d6e7c7be. 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/PLC071307020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e4e1de312f4fcd04af354e00f1e8537e8e75c4de09fd517a9f34501e723b3. 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/PLC071307005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858bea112c676f01fd6d84f91a8dc3af826b043d2be71ccf8b4e9f325b5ce4a3. 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/PLC071307021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb559e896f7d81971eaff79190ae64f4c9e8a7c2135d1e5d19fc44158409c8b. 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/PLC071307006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b65c531be2a8b71f55c88c52bb54e5adaf9b0286f846b75db8db2a2a63ab40. 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/PLC071307008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9baa51bd5dd888d7cf6bac9481ca9bcde06225d5f0c875c20f41b3a98b26364. 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/PLC071307026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f131a93f9e072cd0f7372c4a5af17b8276d6e35c5b71d4db60359c802a57973. 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/PLC071307011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4699209a9dabe286dfb2dd3f0020727be91987f49334109ff84cbaed5b4acb. 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/PLC071307027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6903ec7aa7a601896c2b819c4ba41703e897aa6776b8932febc002a2efe1d79c. 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/PLC071307013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a896bfa2d1842a359f253fd8182563747e3552a73a1e0a4fe2a7038ac7abb7. 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/PLC071307014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf6552397f7f0a53b3c4f71a3179fe1be4da78d1a96e3adbc608562ea322234. 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/PLC071307015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74ef4e333786f3df24507f9791d976dc4dfb8f88dbe746bbfbd4388c4a239d6. 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/PLC071406002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e739e0ad26b1b2e6a7e261ded83bba20228072d2ea934c05f16d025b80d9822. 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/PLC071406018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908000410b7dc9b45b0437d16c80828a04b7a87f07513b8a990d918e6ce77fcc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:53Z), 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/PLC071508003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f84fe4ec03892d2a499ab38d9b5e9169babf7953f54dd7b984011ae70fb655. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLC071508006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d5107d0ff9dd479fe5e9888ea76568382007aa0ca0e5e2e9ab8157e39d659b. 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/PLH851200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eeefbcec0de8c09dfff8816151dc8dd045cb83aaa31f71640217e7b1520d2f. 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/PL41A1800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9793a7bc4157a6842c3684571788f6d9b10cc87a19a6bdfee54996480aabb5a. 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/PLC071404001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceee67fa76bc1e267569cfae4ddc7da87b6f439630316ed3be0b1d4b2850f05. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLC071001019.
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