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 0x6dd5e371fc2966324a16bee4d805f1907b7f87348b29ba44b438fd8f31ae11d9. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cc052e1-360a-471f-8097-26a80e8508fc.json and https://artists.proofprofile.net/proofs/artist/0cc052e1-360a-471f-8097-26a80e8508fc.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 0x31e2ac6e003db28b14d59346759ca966ade86306ffbb727232cba414d6d9109a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CH7812411080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2815e1a599056873a506b89c3435774cf252be6e869037182a8a4dea45af3a. 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/CH7812411081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc427fdd5c4c9f4e20f2669cdfc84b2971d257dc318d5acac5dbba77d2c0281d. 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/CH7812411082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aea09d8a2c669583dcc78420437307074c3687c40bc984dfdce55303e5d0f5. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/CH7812410639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606af5fce9418cbad6aa494f5c5760252275856466e8c71503b2a087bc1e58b9. 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/CH7812411084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e67b7b18ad5b06b45904ed437bc58e1bb4bc51be906296799dd45aa394879. 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/CH7812411086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ad2fc4ca5eef458f8e25ed47ad76ea98232a18007c65838b986b1edde9a4b9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CH7812411083.
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 0x2fe39dabac888b9aa67879d796f942af2f55ea0080e5ba4dc0175053e8bc596a. 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/CH7812036327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565d571a8b7d420e80598c587c461ec4a3317913dd7bed0a8d2972e6dc8106fe. 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/CH7812036328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a33c0fef826346c341a211888021f2f6aa71b344e9b1fb14b40b5091bb2d93. 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/CH7812036331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff519a4366824647cd93aa1f6f9e5c39bbf0822a8e641ab43214baeac605dca. 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/CH7812036332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94edb817726e04ad9ab21a9aad9f425bbcdd511058d22d1eab393a4fca42950e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812036333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825259b88799205c0826c1cf6195f4743190c85bb47089d50d93b5172a69894. 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/CH7812035545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabc1e8b532f45a4c92cfe7281b9090159cb9370e5ac0dfaa109c27bb912c04a. 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/CH7812036335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41eaa8a2eec2fded07173fd6ba02df22b4336e08188bb0801c2699ec126e01. 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/CH7812036329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2639ad5c511a5e8338442f1c8616a55edfe7a50a97904c679a31ff77fa0151. 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/CH7812177239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a315b7ecfbd598eba3da59e9663394948d8cfe300ede851b745b542025a6b0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH7812071445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf067769ed67519c528186143bedfdc6a415b190977aae505b0922ca8ed773f2. 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/CH7812177237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988b51e0e6818fbcfc2f903ad90983be9636554e56eab061be2a05d869aa1e2. 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/CH7811929573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41710071a454b79f8a6a45146eadb4d83c41efddcb68674de3ac8696d7be60c2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CH7811929582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4751d2cb03fb1397ea7416badcabf3b28055630bb131c25c3d554ae094d7af. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7812343097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b67c70392ee941ae39ff61c3ea7baf4b961843774c6f09fca14568a33fa26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812215219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c41df7ca7b1c69bf3e1fcab41ae79810b51c8537927f1fb32a6886b19b1735. 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/CH7811930695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e80d1e98d691ac01b65d91bef21dfed10d2d8a44d455a1c72897955b6e79c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7811817520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc054c59e2f55d7fa8c6e427c3f9be6b4bb2028750fed891c8e6e5d00e0c434b9. 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/NL4DU2000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfed92b75ca36fd31e1ab869cf8a3b332bd051e3ae798a96395e68577e293609. 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/NL4DU2000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd6e3df4cb3bd5f9085e0c3d18c1eef20381915897edd7819d1ce4877a90b1c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL4DU2000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c90717dd238f4976956c578801819c40247abffbd91eef08c7ec6248b8e810f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NL4DU2000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980f6ba4ea3ae6fdf81433d22db0bda607113eba5510ce42b4266f589ecb2933. 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/CH7812368119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bb8b497921de6c2ab9659aad3a852af7826a11aa9d150889e41c11538e8dd5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812063320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db254099e92290f3df3fa43c87d6b820b98de953e48c4d76069bc468feaf907. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812196676.