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 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 0xd46aea98b4dc953938364637d76b0bebefa00914016eed2d44909f092d17122d. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97515932-3b43-4e1d-931e-997b609190b7.json and https://artists.proofprofile.net/proofs/artist/97515932-3b43-4e1d-931e-997b609190b7.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 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 0x34714bdd2fdb1edae6b3bf173712d05daf650df29fc3975be36c0dcda60bbe35. 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/HKG732007249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe192d326dbbb11416774c67de71555758021793f986013502735bc430b075ef6. 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/HKG732007255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6701acc61bfe709394d3dd065c0d6e7a8840edbdf726b01cc30808af961d251. 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/HKG732007257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7041e87258e08cf221bdf7f343f24656f4806f75b54278eda2d9625cbe6a3d48. 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/HKG732007258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d429784d74efd4ab618d2e63544f188d62b65ae7112c86448ce10ffb65ca0a6. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HKG732007260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fdcf727504af4953710c4385ddb8210516c2b913301f29755aa06002a89744. 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/HKG732007262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdd7009feca3414296e2241f4197ceb2f9e0e27cede9ed06a5e95ae905d18f3. 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/HKG732007264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b2566523ae5fae4c565e171d97a48585200a2300c8c04dd26f548ec2d9b0f. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/HKG732007274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a485288f92a3c98fdb0377258d063a802552798737254c20190d4e468ac7583. 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/HKG732007268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd44e088693cd7fd131d225e52b26d2e8aeac66908644aed7b45656c67237377. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG732007271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990dc1b7a369cb3620679c4cc47feb6a4ec2e79a66b6a0be4b73a916bfc492cd. 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/HKG732007273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa271c4c40cc93b1dc0d649914e38fbb3657608cedb7253b3a3a84761636e50a5. 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/MYFR11411644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff454a04add08b5ea28181ad8ca78f10c1d8b6d32f17626ee877f7d8202356b6. 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/MYFR11411665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e152304c85de06a1927bc44ca3c2e6af72768e749178b28bd2ca6ca776157af. 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/MYFR11411641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1826eff9058d6733e0dfc0cf215e1d63705e08e074616718277eccbcd11616f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/MYFR11411666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3267ff2e7b310209c3bef2f5a6d8e46282ed874238ad5fa849ceb4f312661de. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/MYFR11411686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f72f942694bdea3edcdc1506a5341f9f82df9eb90315a36c5f88d59a55ebaa. 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/MYFR11411643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373597b56502245b8c3ae92e6afc8bc73e4c6fd0f3831a5c056c24ed85c17d5a. Chain 2 (Bitcoin): anchored in block 957233 (2026-07-08T23:07:54Z), 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/MYFR11411667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb953772ce663061ebf3ce1886cc2e99c660618688cf03a3fc390dabacf0af. 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/MYFR11411704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbeee412d55b7d0192cb02b7f60585959492f371aacea124bee6b42ff296048. 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/MYFR11411638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cf0ccd62e94c72f4b173409bd908b4148cb90dfd1d14f1dc73fc81f3cac992. 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/MYFR11411695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69feebf31a1eaa6fab3e987fa4fc0510cab46089c9eca635d3e112a95929ad. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX202292216.