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 0xbaa713834430e94adabae2d356358e467dc2c013fb231a4375feb23cef2da64f. 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/6b367fb9-3fab-41fb-b974-161f61d3375f.json and https://artists.proofprofile.net/proofs/artist/6b367fb9-3fab-41fb-b974-161f61d3375f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Assassin's Creed Rogue (Sea Shanty Edition) [Original Game Soundtrack]
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 0x371163aa8cf054de7fd1d6205a0dd708c3b13532c509f1b4b607e77f72908bdf. 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/CA2BN1401471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf286a7c25e9e8466aaf0d5249f0c6a9467f65ee3ddea01da4fcf667f1d053635. 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/CA2BN1401469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b8543b66c198c54b6c332fdac665a9ac9c8e1c0d251bb5a379c9c2b194d17. 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/CA2BN1401466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7977dac01f2e293f7b724028730462c6d1298bd32f1217cfb71db111c2a019f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CA2BN1401468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31e3ed07305b0f3448c2550b1c99c13f32848cfa44ed0560c771a124a98b330. 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/CA2BN1401470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ff3c89b322358d7f34510dde6011328c7a5fea48d804d8d04a9d4b79c23806. 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/CA2BN1401467.
Assassin's Creed 4: Black Flag (Sea Shanty Edition, Vol. 2) [Original Game Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a516c90ce213aca52d6fc3305a0b3052e89c3177f8af154003b947b0803de. 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/CA2BN1301249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c19bdeed6c8c5aaf6257392130131a09017abc0582570f7fde69e6288a1ed24. 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/CA2BN1301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a74a5e069612c4115e8b53a06abd5c68a7c5cee8c5a77b57b2924be5087d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA2BN1301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1f9519702c397af60f8ddadb3d819082d2993fcdecdf59d619588144986227. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA2BN1301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dff88dc1a1f2273fddaf510a8b9c1efa9c700ddccc6b0173f98bff3bd9785a. 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/CA2BN1301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5998d2e431fb18b5b5a8f8fc2705baa95c47fca954d91400b0a34306fde03cd4. 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/CA2BN1301254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247d5d554df4fe82563b97ef8f81951c6b59e91b70fe22cf5464226292780afd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA2BN1301255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4da836e986a33d98b81ea9c6d5c7033434dfa1829f2c43867a4590ed2d6d6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA2BN1301256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a3b04a7549a24922aafa7437daa07c10cfa73a8d15df6d41d99ba4fa08bc83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA2BN1301257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefe4c47c6154317ebb2764bf0304fe6e4e5204380722e5f5b68fa5f6b9ebc56. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA2BN1301258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fd2555910e882f714e506e5f4b66efd9fbd558a3873023ad7af7453238bfa9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA2BN1301259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6e1a787ac8973612590780fa1652cb9b5c9bdc430f098f2365869e497c3317. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CBB472200019.