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 0xf4b6c19e121a2baada3b8b04e4f4ee84d3adca6d012e514cbb056224de5e53a0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/967528b2-f08c-4b15-8a2d-c6acbde9f6ed.json and https://artists.proofprofile.net/proofs/artist/967528b2-f08c-4b15-8a2d-c6acbde9f6ed.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 0xa11b838126bfe093e0be67917f4c09de0fc4893b7eddb46c16c577b4a9515a65. 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/CH6541869182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e3851c61ebd6f2c682c1512e6022b852ccf7599de6a2f2c59e232f19878778. 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/CH6541869183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7e0040a0663e62c383a6dee813e2e3890f8550f0a9c8bb57067f46f99bb341. 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/CH6541869185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c8403f59e23cf5ab8323fb9a96313f6d99a8370473d2d94d6e5bb39c2a4215. 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/CH6541869186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246cd857a493a99e081abc8a54c2db29f368adef324696625f66eb115e1042b0. 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/CH6541869189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f870eb4608b500221acb139123fa925e4fe15a2eaf4d557f400908d45223bf6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA82271308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9322cd1d4caf472a11183e18c8b0b81d19217fbb5a0eb8b2273fdd8a4596c721. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES62202393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c2b93de7a460f3e75d1585d4b4286e8a117ddf532b1bc55021fb9c62521033. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWY2284045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7263c53a9ca437b08631937290c27a876701bbc957c8cec545c51c4d7dfa5761. 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/QZK6P2435270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e5b54c27b308c50a77e8028270715f9ce871b3abe5366eafec53aafa1504c. 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/QZK6L2443184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f043fc2a424929745b1245df6f959347c00edc0df087025e647f899de644388. 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/QZK6J2457931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa855001e4a5cc053ce3a3521a6b78fd3031a4205e033dbfe146506af5caf601. 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/QZK6J2461263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0cf04401244b7a06152144fe3efd628dc9445b4df8267d9fdc3e18e9ba328e. 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/QZK6F2413106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0cf04401244b7a06152144fe3efd628dc9445b4df8267d9fdc3e18e9ba328e. 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/QZK6F2413106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e5b54c27b308c50a77e8028270715f9ce871b3abe5366eafec53aafa1504c. 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/QZK6L2443184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b0ed46b963aafe6eb9b59bbafd2a607464057e230772cd17c8f7cec985a2ba. 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/QZNWS2453285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa855001e4a5cc053ce3a3521a6b78fd3031a4205e033dbfe146506af5caf601. 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/QZK6J2461263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7263c53a9ca437b08631937290c27a876701bbc957c8cec545c51c4d7dfa5761. 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/QZK6P2435270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0755c6c32879f98cb2a390db3636839ccfc51256e9860d5d02b452cd3dec2. 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/QZMEN2415492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc980bd8e13dbc728b54d0f45c705c430ee99ad6b908e8f65c35ec50c59ea38. 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/QZNWS2453286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f043fc2a424929745b1245df6f959347c00edc0df087025e647f899de644388. 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/QZK6J2457931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372478165f7332fb1a58d7e462138f7b1819abecfd9377588e6fe8f41f5be0a6. 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/ITI640700016.