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 0xb2f395ca66ea70794c528688275a05b53a898e1a0f7122d4c72a1a56b5e6f5c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/888be994-a3cd-4af1-8adb-afdafa5bb7e0.json and https://artists.proofprofile.net/proofs/artist/888be994-a3cd-4af1-8adb-afdafa5bb7e0.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 0x23b025e506505f341ab1b57999c4f5615ccc9d87a59cf59e89313f2e5d980433. 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/USA2P0611940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98f7f7225b8f91dad7b8340f53b36a4f3edd1da26122885e078bd9556553a5b. 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/USA2P0611942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ceefc197800d404a2c49fb03d1601b7e787dc1ed9b769201493ea328d64c60. 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/USA2P0611943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaa84f3fd8ceda4cc77993c6c3b085e5c46103e2ec227c3b4f005aa3738bf71. 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/USA2P0611944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa836d43ef55cdf7bebd1cdd47fb4a44b6f07c26e829ef8083c2253e08460b6bb. 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/USA2P0611945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce8ccfa98fc62584d443d7117ab22c6356c69bd9ca5d17a1748cc04304a5dec. 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/USA2P0611946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf034a59cfb67bfd599072c00ea3a1f1b3d0c16572f823eef347b781087b7fd0. 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/USA2P0611947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ce5aff96a587ddb6833d781f547196a3f782bc1d86a3b575067ff2672123a6. 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/USA2P0611948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dfaaa4bdff9f031792219b143f1e7761b062a27313a6603b6f4eeea514a394. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USA2P0611941.
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 0x48dc86ae6948c98eb60865a1e251a3f97bc0554f363db563f0db5e47ebc81dbd. 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/USA2P0611949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8289f225f5efa3f1b337402cd03cd514aa363eb76ff24e3de8f1f94c4ee6ba5. 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/USA2P0502706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eefacee88df21f49bbdd0a63f3b5fd313a09854abe58617c285a8f573749d9f. 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/USA2P0502707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e690df6fc4efa68bbf5f50d9166085d813df3f0e202944f42bb59db135a472. 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/USA2P0502708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf0d55bbf08784af6d489b725acfa81f4ab8b3007d402005b59607c2f4baa7a. 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/USA2P0502709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313ef9f8e6a178d51254d8d4ac48524ac92787a5085eb1f1068863c277a368d8. 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/USA2P0502711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54cebd14c7d9c1a0f7b519df2410c278f14ad630ac4d9f2cecaa2bd06c7b4f5. 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/USA2P0502712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8872c8df521a28c01ac43b7f9de2e4ef6186281f6789327ccf0bda40527997. 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/USA2P0502713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099e0b0fba9ba696df859cec8eb14b3be82634cc93358842ed82deac0b5e2c5. 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/USA2P0502714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa46ea8ecf38af986f25762e1503683286a73c8fa8d9e74fe3329c7af51973. 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/USA2P0502715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa39ce730e0dafa19c9c336534cc890c0bbd413936b10cdc03ac671102c33d5. 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/USA2P0502716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2274401e9d2c44588ab90deaf9fc3cc1746336c2827de150f4fe922e310b9a. 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/ITTL52214003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d7eec7f754e1e346bb1c3af9edca2a5c42f8894fe5aed661881c6374e919c. 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/DKZVA2000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff3224a30aeab267060848f65bc7178a02483492c061e43b18296198effdf2. 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/UKACT1840765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb5ec9a6758720dfa8b513b7f59c00df7c4219721195dbd772d1246bc83d2c. 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/USA2P2019882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7441742c5fff7f14b4fb2994c6e005bae96fbbbe91c509c179aa9d91673fb39. 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/USA2P1134463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6377f398c7b0531fc9d94db3669f523cc8508f92cdbd085f3c43bf9fd2c7a80. 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/USA2P1134464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297eacbc133b65cc7ebe9d0d205493915877ea857a796541104397c5de3bcec5. 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/USA2P1139080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e67050579c8800a903bb328440c4daa4808d40b592b60468739392c6e0ce5. 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/USA2P0600103.