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 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 0xa394cf7626bac022b3efa0a24459ddecbc55c30baaab247911da2b46ace3cb91. 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/257d01a2-5acf-4564-9825-65a26816a504.json and https://artists.proofprofile.net/proofs/artist/257d01a2-5acf-4564-9825-65a26816a504.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 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 0x91ef2ee43177880ece9aabf364dc6334bae3e8f9c478da02eb35e0eb49ee6803. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAIN2469965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846cdcc64a594dba48592fe96ac9ad9ef73737ceb63de6d57a0fd0594a985824. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIN2469991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10709ff8f5606e84a7170ca82b100890295540e0470ae280e477f0184f75e1e5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIN2469992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a8ca7915b5021779cb32b6facd0694a623ae5ddf0e635421779171b999ef36. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAIO2469994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d6d2c3fde5e266e99de84d5263bcb62f6c43caa280d9f19ce04eb7a325b1a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIN2469998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe014281211857b0372ba2f2a5ce24e746506489e6016a3f11d24d00a45138e80. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAIN2470003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630717c05bda306ad97d3c26644295c46efefd212d792e70a0240f13af5e881. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIN2470007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32a9730e5d3fa2e45066e727bbc08383b650c43a38f3c648394ed003970f64f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIN2470010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2321a3181abe9afd8ab26d9640801be6ff510ff4495cead903d2ddc9473df093. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAIN2470017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caebd80fde7f1468622b4a86fd5d6d659dd832f607f8217c4440d6a9b56d344. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIN2470042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb908933c5ae90d315bb8db22ca4d03ec898342d44920de8ca0aad3d24236a009. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIO2470044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80998691938e21e40077abf10a6c7a37c69935a9ccc11c2f9f968c134f2d9f2. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAIN2470046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ee89defd715f1d8e4ea574175f2e7538cd82954780d2a18eedea2b0f435a29. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIN2470052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b707531cc9fe0085652e7059ea9a9b0ab54755a9d0dc705a633695ae439ea4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAIO2470055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a965a360912b5fbbefe6be38bcb7bc5a1672bc0d8f4139f748518f2786870. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAIN2470058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aeef53b76dab04dae5f176cffb261549be11819e4cf06477ca0cb74dd44c1b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIN2470062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab64079b5b88da10c23e5ab3377dc3125e922343e63db98db8301211c7e35b3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAIN2470065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb005d9a2d7f1a1bab2a102072d9cc7876b4f7eb15000edecbd2eaef318c83e8e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAIN2470066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a8fd71b0114bd0b7901f044573b097e580c757500d0e1fea637d48a02817b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIN2470071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c0cb4faaf2fc9a2ed470bf6c5f877212ffce9152cf57d778642ce5d44cf536. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAIN2470073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c4e7527ef7b2b19d6c7d92d46312a912f9423b24a9f71d90a5d0ccbd6a53b1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIN2470075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b46a3920955cc8d401569bc7b736332a9da206d99bd5a04ebce0e9bae82b1a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIO2470077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fff5f37444d3ea9b712c0841454ea34bc8d2d8843e07f5f77646602648a3db. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIO2470078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442e4348ce9dab49b2c08439d0636c3b0b8c8b7d5612e5dc09a6274fcf3ed9c4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIO2470082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fbc9bc71de5d572dd74f836e22871cb8956dfe16ca9430935f25e37899d3ee. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIN2470083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2f8f788a5bd90891279bc7a9a7c0d228b6d2b6ced046eb24e85e271c4b1ae3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIN2470086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0576a66a3f5704f179f061a076f194cf420e9bc1ee3dbffe8d5d36df78614ec. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAJL2565876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d53f6f95f5ea81f564b38b8e6c27619c787015b1c0bd11dec3ade29f026289. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJM2515882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b7f8cb89abecdcde0c26446e7ea0ef4375a9d11f257be96cd03ceb3868d097. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJM2515774.