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 0x1dfa3eface7c6f261fe998a00e832f5e8f30a03357012e9cbd295b6aa6532ca0. 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/03a1b6cb-8f23-4757-a5c9-3f14a4e97b7e.json and https://artists.proofprofile.net/proofs/artist/03a1b6cb-8f23-4757-a5c9-3f14a4e97b7e.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 0x7c369bbd342448213add60be3e304dc56d693bbaea62bdc789f19e7920d6fb21. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZF452008952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc57460a49b462548b2b7ac0eecc427b87c3d3eeabb36c0407567abd181b8d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:34:00Z), 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/QZF452008955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f85c67caad07a213517373df7280f6ee55ee965cdd949249a51f0695864af8. 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/QZF452008957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51fc06686f85bb3133f1053e7b75c002402650ce9f37522035bd5f538a17bc. 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/QZF452008959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8655e69c55408289c4e0dc26271d58afd1088ebc4abe18d37b0d448a2342b72d. 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/QZF452008960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64609c769d0603911ba95ac549c149fab33aefad47cc69b28c7f7ceb1c1e589c. 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/QZF452008961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda372efb932ac2d91ead22b86b3f7a7c6af18524f58fa7f60505f9e2678310cd. 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/QZF452008965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8671059deb101d9b46185ff0a7549063aa7f4430c5c89c6924d16b8c522952. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZF452008951.
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 0x8d8ce5351658e95d00671dc0381e1cdc9eaa47bef98405c9dfd7f3896966199b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZF452008953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d4f45b95eb4dd89f59ce1e7db61a2480fe146c3faca808f76f15bdb7c8eb2e. 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/QZF452008954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ceb3b56d8b8ff1e844217a92650143512d878e1e3472c35c0ed07ed4f0bb73. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZF452008958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea8d3ee2d5451f4dbc75c89d7d1ec6606ef8d65c0f51e9b7baadc0c1fcd362f. 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/QZF452008962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069904d64a2b1092a9bfeb38322bb6c99480a5b43f7297341af0f76163fa2fde. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZF452008963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c7c4d5cb49458fd7879a8f9c3c29f9ffb00a010e82dc2c43485560587faa1c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZF452008964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5e907ebba203872a4b92418ac4f8eb77a0e3d52d7d63a75abc07b88417396. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZF452008966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70be5f00355dce44ef04441c28b97643fb7f85552e0620299b7972052bc85e3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZF452008967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc941738b3ec4522d67a18c4d0ef0e8c0885d3187efed32a119d3a2ab7354a5fc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZF452008968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1181acc714b12262b225c1526bf735ea56634e9f67ea729ed37241ca1e5e4b46. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZF452008969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2d0ecbcd757ce8b0af1679f34243699dedc03308a2ed9d937c4a6b45772914. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZF452008970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9524873fd98efaaef7893b9e25639f100fca1153c83bf0e4ca162023ec5c50. 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/QZF452008936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbafb9c68d7ce9102216daaccad7defe6742704996bdab228e639536292cd0e5. 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/QZF452008937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc272e4b204c5024a268e128cf2275d7730089e2b65e83513201348d362fc74c8. 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/QZF452008938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd266cf3345d2b1f346c8216ce58244670441b084d260581918c70cc520a9ed8. 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/QZF452008939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1ccbdc269ec0c61f1911fdd80f0ab8c0ffd189459df0122ea2169f8088cab5. 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/QZF452008940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb0ce72bd4186f34be2286b1f86f21ae92f82f7ecb85447e81f059327d33876. 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/QZF452008941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6845723bf986a61d31ac997a954f9e611ce6e4d100c68a4b7ad5fe079e9ebf. 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/QZF452008942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ed29e9b34f2f8d22dbf00216145e451521a4809ab776a0563676ac47ab5eb3. 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/QZF452008943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816a118e4eae853c0409ad999524ac6d9d773a64dc12476389a0affd3f084006. 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/QZF452008944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38143350ed26fe1b5e79bbea3664ec6ab5f6b7e65908345875831ddb01f6dbf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZF452008945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640502821f6e20c921cdb2ea1e0993edf5a1161825cd1b0295b285428ba124b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZF452008946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80fa7a0ea78ca3cb6263bf3f95ce9c6b28a1f7084ac68f31af056b7802a8688. 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/QZF452008947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4056e9edd4e1804d9627e39fad8c7a9d4fdd39a35b3edc77216b1e4eac41c2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZF452008948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd209e267abb3bc1836e0d93ca2cb0a73f7fdab9d9d9fab626f12b0b9c80bcbc8. 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/QZF452008949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f44e036d6c81efdefb357f2b47b3a05886452767ade9039b3f7564f5b14aba4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZF452008950.