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 0x9275a33b393112003101afd419d147284e66155984023b368632985e5ce4d3a9. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0555e24e-6ceb-4bdd-ac0b-fe798beefbd9.json and https://artists.proofprofile.net/proofs/artist/0555e24e-6ceb-4bdd-ac0b-fe798beefbd9.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 0xd08d53926bd2a06a07da167d9b345c9a1109ead458de564ab8f0d15442314fcd. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/AUMEV2370994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165add72b97139cf82a1312efc93ed4c040d1c8d7378dc942185206a1be5765. 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/AUMEV2370995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b2f4130ab926fddf8dee6617a3b0ebc3d49faadf40ebdd1e0dd3b86dd220c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/AUMEV2370996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a76d4929f9814801b683fbb29b9090b1c8ed3214aec73daf8d46768307d2c08. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AUMEV2370997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7441123d55e8d84a49fa525ddb1b758e40a3de0cb39a7a16616256bbc6970e77. 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/AUMEV2370998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e6a70b518e13f789fd9c78069b566db19f0075a6a2f5111d810f1f42695f60. 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/AUMEV2370999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb7696156084c8502705b9355ee515c95901195e7cf50d1f099b546b23951d2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUMEV2371000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f20ce3b8b44bb396c856fc51f9551dce3d09ccf58d203b62dc2980a1c3044a. 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/AUMEV2371001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87532c52440ad4a60c5d7925ab5a90bdb4d3836bb59256e24b6bfe0762dd9753. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUMEV2371002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df982220f882b7e628d528753cfe1c7e017294d0f99822b009aa71e403393b7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUMEV2371003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d493f15844a9aeb81d530e6447cb41cb7e6512f46ff3e7090f7c103ae5c718. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/AUMEV2371004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ab9484430fbe5a932fabc07842103fe257010686e64034b2779fada506f759. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUMEV2371005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3808bbdeb97a40ac7a731b071b503e7d60c9c59c54043b93f1347b7648df92. 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/AUMEV2424160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6682d4cd8e5855ca17e3247c298b9a2dfef35d8e7092283ce2a2b243327051ec. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUMEV2424152.
The Available Light - Live at St Matthias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd214ad0775be33e2034fd596819d69548fa578ee2fff5b4fd5963219a87bd22d. 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/AUGBT2327339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e6a70b518e13f789fd9c78069b566db19f0075a6a2f5111d810f1f42695f60. 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/AUMEV2370999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d38a13f43e3e5a47dcd0f99be1e65be36885f381f3fd8041e32c7748009e8. 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/AUMEV2207615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b341601e6774e7106fc74faf72c8c9bb5460a3a20f5e21b9480b440c51cf75f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR2X42223912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ac55db88e65aff9db8f29e970878bfb2d21dad1d5a4b5fdbd142a6c80685bf. 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/GBLFP1976478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ca2c0178752c3e03da4e0884e59416e691e8a831f23742d72a6aab35ea20ea. 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/GBLFP1976479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5125725f656ae96bdcc5f9cd46af104589003298884f5842ad9d294e58a564. 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/GBMA21891598.