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 0x1c3ae6554763fc1df6dfa8be3b67ceeffc3ce1514bb41f84583279cae5d9f8e9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ced4e39f-6bb7-42f2-a410-0a3714f43de7.json and https://artists.proofprofile.net/proofs/artist/ced4e39f-6bb7-42f2-a410-0a3714f43de7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Floating Free / Joy Within / Two, Three, Break
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 0xa3fd8276bc840c25033251ad6f519254684c83e52b277f2fe90b9cdd66a222e9. 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/GBYQY1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012e36855ffa71c7dcf1d56b1a7a2679b31a0b8523d4e3e892ed793b919b1e55. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLCK41011050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a5b4078ee7a951ab12018344e0ddb99d308be4dc32c089f2cbb1bebf80c0b0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GB2LD0901868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d58661768e7bed6351131b51b5ce1e4bc285955d5eb614ad6d52e5ced2f567. 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/USQY51583729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af04a0f9e7eff57aa03f1b8c3fdcb9ad6cef2dffce37a5aa6fbdd8d75484be5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLCK41047629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5734d9e5866c0a26ccbbf35a2ee12e749c1eb465ceedff9071d12530ca93649a. 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/NLCK41047631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201570ec103d0c3fbc3203af6d5c1c397d6cdd848cb1254c08752aed0df684e7. 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/NLCK41050612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af04a0f9e7eff57aa03f1b8c3fdcb9ad6cef2dffce37a5aa6fbdd8d75484be5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:57:28Z), 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/NLCK41047629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58edd28a40ff82462c435629692450a90bd381570b7460c36891856262576a54. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLCK41044406.
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 0xf47ecb00df157d6dd4413e7119d0cb9af7d91d93eb29559e15afdf049297c6b1. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/NLCK41050613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f0b9834b67a4a3dea63e404636aea07f8dbf4d5390fd0468aaf63ad9e03df. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLCK41050615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088c980c03ba0bf2e2493cd45488820dd4de59556ea6a673f05adff05532ea8e. 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/NLCK41044409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1376d2208e5360f63394d107dc771d7d8e9e1988df5852e409f1f8d7c5a5b70a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLCK41050614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a496cc747797c684689002f91659b72e3db9f7e187be879136a73bfec7d1420. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLCK41047632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d27fac039f8a00fc2107db3e54ff81b99062c3895fefad94f051c88174d06. 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/NLCK41035564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4472496cb8922d1987d81e4325e733eb8aa3384e095e813c2ebbc60090ffea. 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/GBTKW1401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cddb31d6ec0009bd29afa1110678bd795581c1b6534a247260c7b09f50f063. 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/GB7BP1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43760460217456ae018685f7b78836c9faa6a7c9bddd7a78e0c6042730d1e196. 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/NLCK41500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95976354d8af105799490229ed6be821c7816424f48105036bf6db4dcee29b93. 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/NLCK41029104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dffa50649b3bddf2bf5aa20875a63500249a4fce1247ce4e6dc9c0bc4550547. 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/NLCK41024512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ecc85d5ce1ac7bde0e91b9c760b2f98837e41d233da89be11d62e9681d459. 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/NLCK41404392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95976354d8af105799490229ed6be821c7816424f48105036bf6db4dcee29b93. 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/NLCK41029104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f9ede9bba0f1be18b16f6798dd6569939486fc75f0f225fb0c7d3cee88d5c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBTEL1200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65feb48d1affddfc72c761ebbc5d0f92b805ac45959a6dfc341c0f390f6155c8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBTKW1401213.