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 0x66fefa74a676bbe56f91ef600ec3f63ed376a8a477c83b2bc843ab7871b95909. 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/85a446cc-9736-4b68-a5ec-ade300a2fc6f.json and https://artists.proofprofile.net/proofs/artist/85a446cc-9736-4b68-a5ec-ade300a2fc6f.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 0xa3df3a7f8cc5683999d97a5670804936e6fc92f498ac7f33b1a7912ea948c1c6. 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/ES64E2206274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbeff045ef224da533cf47283987ba1ce3968f3b0374fb36882cef0a7dd9bbc. 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/ES64E2206277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814834e4615fae09adcf05f8adb76569f9ff3bd7a210efee56571e56644a93d2. 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/ES64E2206280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c880a231b239eee600dc816e953bb3b0aa86ee923471ef5c76e49ef90fe4c5. 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/ES64E2206281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d139a50883beda5fe737b99fe7f686471c83fd2bd49018ec7d5dc4a117a5a0. 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/ES64E2205659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c95d4c34b769be521efc4016fd8cac40953d86ecf83f7c345137052688338e. 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/ES64E2312290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68fc9746c65917454318ada4e8ef858c39b58261db11a8cdafe57c733a55583. 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/ES64E2300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8598aaade7507e3fafe3940881624e2f8799722d7bfb9ed86b9bd6e09f174ab. 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/ES64E2201615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbab1c9b258d03b79f0b9ddb7d357dd9b6acdfc52b6e06602be70c3a0f727a0. 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/GX3Q92092552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba11356650eb9a3e9b69c0b694f95e4facae7ae820492ad22d917820000e12. 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/GX3Q92093231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b0398c17f0d1d40c60f4edee54e2868d0b8b2c4bd69fe911f9a4a0460fc2a. 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/GX3Q92092731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4a9b6a37f2730a0f32319337cea6ac1820bdb5ae05cf2a800283006df68273. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLFP2156291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234430490d561b8cfcb585987fca35b975acda608dac246abc24019c5672808f. 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/GBLFP2047608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a8ebf7405f470d0d49849575f390f3a07a3f8f083e6f41e72265435940aaa. 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/ES64E2467458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1407c9eb5c902872fa181d577f93d03d435af26dcd81b9c1a402da1858b5aa63. 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/GX3Q92098345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28b04efbded66b47aad330a9236f60802234d28a022b3dfc46317360f2a6456. 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/QM4TX2291169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54857905c712db0cb2ea045e3d0225ab70a11945b69d00426405a25779fa3d60. 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/ES64E2403014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85101ae305522ff0920c705d5e723dfdcad78e15f9798cc5109567717e260fd. 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/ES64E2501854.