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 0x6a786752adcab1c7078354a9fddb85f5e1a700ba3bbb62582dc11c05659522b3. 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/6e3d44f1-ff5c-43fe-a402-5c37bbaa0240.json and https://artists.proofprofile.net/proofs/artist/6e3d44f1-ff5c-43fe-a402-5c37bbaa0240.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 0xb970aa0bac3dde7d0f2d94519c9f1226eef1f51508a5d33f37e0c6ea8e8ab23c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6Q2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea27e9471a9caeb7dc3f85c17e2d5cda6f9e0a5333109c87595b5917c26bdb0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6Q2200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e101925dbec01f9479e79ae6d8c2e6e5d6ceaa61ecdad9d0dd51ddcb09bc1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fa83d8715d6e4cc46638a0efdc324d21288dd08895669e7b90faf5ae0629bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6Q2200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1aa3ee4abe71975a15a8aaf44c66626fec6bd0e0727d21cc59ee9f85b1aea1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6Q2200274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a418683f3ac1461830f47170321026c2e5e7d4464c760040618814c2cd46ab1. 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/QZK6Q2200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400153d56dba3f1bce77cf3124ac56e9f8898ddf3414866c77e793f310224c34. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6Q2200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cff65e9e51916e341fe9bacd7f7844a8e67bfbe6fc20b58bdfe11798675c27. 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/QZK6Q2240743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d68791cccb2dac1b6cfc4c99dcbc24753470252a85d0d73e469eb641935c8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6Q2240744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb618f121d1c0d79d866a1724dc6a01b31c7bd74bb957a496698d8c38b9b33. 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/QZK6Q2240745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa549cb3c56bf6534dbf5f14b0de622fecc296abe2149adef1b6316938f3e5618. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6Q2240746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c4354e99e2665c302f7da96690bd8a2ddbb21d158993b0aa9f3011305dde17. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZK6Q2240748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be408f0af39fca23559c08e85e94f53d2fcad9e6826fa3104be5d238c98b1e5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2240754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae6703b50347043d57460679748833235bb70ce201ce4ee357917873608a9ed. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZK6Q2240757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4f9422a77ef7f11271f269402d9ed59b34503c296b9ccdec61dc2545a672a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6Q2240759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbda8ab72a9b977f3f0f626609b8fbfe518472ee9485977f5ed93db7a9d7046b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2240760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fb9fe97cacf880abad6545f1664e63b7d16567154adea2f28eb43491548dc7. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:14:29Z), 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/QZK6Q2240766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c4cf934f410af5c928e1f6b973c2b5029096a45d613fe38e242c2e53265629. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZK6Q2240771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab62df45605e020c45cc82ea8b2d23bb5f076d97fa3ce8f6f884e564af86a66e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q2240777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2e7039056828d534e5856502a8ba5cbd919d05003f4957ecf0f3225895b50. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:23Z), 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/QZK6Q2240784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf33954e75c13dbb62c900e894fa4282938db3eeb45ff8cbab3de7e0064261b2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6Q2240785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e6b1a0612f8a07e083e7ced99be5c41a95c5c13ee3dc486bd900eb0d97014d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:30:44Z), 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/QZK6Q2240787.