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 0x9d84cacf8fcfadc133d2363144b2953b5e37fcf3b777c8c2381b3904b3035221. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4853d23e-52c1-4cb5-94fb-1d7765209ebe.json and https://artists.proofprofile.net/proofs/artist/4853d23e-52c1-4cb5-94fb-1d7765209ebe.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 0x2419b407ef90a7fc7f5f79812bb3eee95b99a612e5d98dc4206df8035b2cae13. 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/CH6542034835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5815574abd715bf61177a898ac8d3a8753e1e30e450f1f424a7f2407b0262dc4. 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/CH6542034834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149f7fc50d11e6cdcf1ddc7d1b56be507752dcdae7daba872f7a0906fbd55278. 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/CH6542034833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e39c24f0f3c52063e16901a138963cb9a00216e9caf0429bf77bd1646e3781. 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/CH6542034832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f3f927ee14e51ee3f118a4daeb553efd79e21eb9adc866e46afc1a6bf5a59f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH6542034831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d10edad527ef982f95165e8b1a70e7b8277732d6dcac0d2b05a4225bdc0ab. 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/CH6542034830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9508b6d4beb6c419d697d95cc29cf10db0fda8f8a933d97e912ae2ffc87d5c2a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542034829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e63b86dc663b7118611073109c44d1b78fe64a317b2fb13c050dc2fffd2f6f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542034827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a024e4d2c0b78b2ff6d2c6d69aff92e1200678d92bc774bcccd9cadbb7f81a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH6542034826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b240b32191de3c172ad5f0ad36df85c8f0370aa8f7ec01b5bce413b7344739e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH6542034828.
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 0x3d239ece3363c335fcd1a7d4f822a67bace62ebb0af29da83a125bef53a403b5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH6542034825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0aabdc2f4ac6221cc43ca370b5a5313e116b0db3e4a5233cb6257c37f78105. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USV351316159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6feefc97cc6a46d9db121715ed5ffcc2cc4ea624a9c5f36997d0f21738824a. 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/USV351316160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18aeac1a84f4291431208a5e78c98bc815aab97b80a2fe78f334b6f62dc91fb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USV351316161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a0771b94082473f746171129b5ffbc022793248ad5d7bd65f72c9c64618bb0. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/USV351316163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5af93629292d299509249cf55ddfa12af21c65955eba0efd91a2953f868d0a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USV351316165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5cb4ebf3de012924a2a81be99a7080a6b52e586b9d7919c4e346dc8e6e3f1e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USV351316166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998585130713cf60543e34943b9ef2b925f33d79b4360aa5be661d4dcbec7b4. 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/USV351316167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be6377c03f915774df8ea30eb170e28abd419ef117fd959b5e7ab67c8c0e6bc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USV351316164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a27909b47519d9d5c1d693e46c801fb3572c1f3247743369d984a0879ff8c89. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USV351316162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1b149e3c1cdf7cc16335c4e042b6d4174914f7d947fbf4bd4144c80a364d93. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USV351316168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70663ed187d276790ff51c276e8f9b42fcae1bfe94eec4fd59dd2655b6d7e164. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USV351316169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65e2a75e129447bf562a97b6f5744cf50a162bcf8ac217e86284fbe1d09e331. 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/USA2Z1611324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7676dffc1eb2b0c10d9bb6d274eed82708260452fc1acd66d5bd138bcb9bc3. 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/USA2Z1611325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa032fd152f19af469ce854f754c2e5a7cb5d142650f8d4d05429e6b0ef854743. 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/USA2Z1611326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b969da2c1aa5da1d184edd7a22370b566fde2f5817750eb4439167d61c0a7d9. 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/USA2Z1611327.