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 0xf89739f15bb973613ad749bffceb9bfb1302f3c05a09a1d6c69de4a4da9f5202. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0a52d7a-4932-4db3-956d-31a46a57bf71.json and https://artists.proofprofile.net/proofs/artist/c0a52d7a-4932-4db3-956d-31a46a57bf71.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 0x0623b34f7dffe3cc20bb5e633cf024e0da6473a614bff2d4c36bfea45d69972d. 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/CNZ632301512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b93174cbf18d5812532bd917d9feb7bc1acc3dbb2a6324dd3e9df8d58a2e97f. 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/CNZ632300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b93174cbf18d5812532bd917d9feb7bc1acc3dbb2a6324dd3e9df8d58a2e97f. 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/CNZ632300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a56923edc45732274bb9e8d07422d803cc741d639f8d0f1826c6cbb42d2475d. 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/CNZ632300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a56d635e7d3290656df49d5c0eaa799687b823737c67e513da83e417963290. 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/CNZ632201373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6e8814982520ee67ef6c9c6c3b631ce730308ab385f3bbd31f10c9009d5f37. 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/CNZ632201243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8f37ef364486b834dc8a5b43661db8285e458f06b4e59b8b58bf0820e9fd01. 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/HKG732317814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f227c916f815f943703cb70c3cf767f93c08b4867d32303bc3decc3e0c5ca5. 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/HKG732122872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dfb714075659be2bfa8f53527bee3dbc05f406b0e01bebdfa9b5243e2a6d91. 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/HKG731568427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d5208950b7b036e6aa15acee6fd1a7f5c25479c0e7de199cca9ec810973c3e. 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/HKG731568424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c16a2d71f7a677c05448ad005a492effa7bd7f7b868baac1311c572cbeaffb7. 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/HKG731567999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66caf9e0a1798d4059a5eaed265f2d6977cb1c22386b1902406e2bb2d3bab2e4. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HKG731568097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14136e682a7ab39f25a8db6c9517824f296a88453288f227f96b035029ecaa8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG731568147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8bee26ea9d1ee8bdfe8aa4f6697d9020112233e0a54cc791b3fe0e91cdb786. 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/HKG731568700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762b36b7ccb21ab988908c3a7a1e109cc329ea4e0b3a3a99d4518bd4436dde3d. 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/HKG731567885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b01c2ed3a889a69c5dc78f64a52725fa7f102f3e3a49b7e99114ac89ee161. 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/HKG731568841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19216452d87e6ba062e81a77b33e90c18a02bf7d4c6f25de28c792a0417d2916. 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/HKG731568294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96dad9cb644b9329ca873d3a2c9d45a39663b322e53cbb61f27f5330f1b8d78. 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/HKG731567571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cf530eb9aed342dddf1d1241d7f20cc71737cb74c76aa0a8fe09ca8d50356e. 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/HKG731568819.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c7c9dc88b934f957a6698d52651306e903e72ec6f5a5502a97df9eb13bb258. 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/CNZ632401553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70870690a1521af75a1adf071f4bcaf6e2eddf3246755b53b38ec140b155a082. 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/CNZ632401560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9887cef98d5ca96fb0b13f9d2a6bedf14ab1cb7df65f5a10b2c87c112acc62. 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/CNZ632401558.