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 0x136234102489c3716bf78d5e0b68a9f279656924499f6df72e4356238f010adf. Chain 2 (Bitcoin): anchored in block 953988 (2026-06-16T18:23:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d98eb3e-3faa-4b8f-8989-b565b9681c6b.json and https://artists.proofprofile.net/proofs/artist/2d98eb3e-3faa-4b8f-8989-b565b9681c6b.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 0xbdaef2bda3df70e4989dea66aad8d4f65eb561f12ee2087826131c873441731d. 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/AUZR10700609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834bb8f1edfdd0c4cd1782e778f5f1a93ff2c8b9c244ddfa5b8ee566ab42b45. 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/AUZR10700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee8d1cbad7ef1f1863b2ac17b476841aa91ba030c61386aef8c5b3600a4126. 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/AUZR10700613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b7553bd30efdf91920c52b3008cd22ee3da14cc340bfea913f35b06ef0bf9. 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/AUZR10700615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15e0a660fcc300d0331b21812ffcee03eb08a3d52012d94716719f94900ea5e. 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/AUZR10700616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6216c75e4b0cbeaad34e2b43d7fbe4cd73a96c40e7455fc65ddd930ccc0909e. 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/USA2P1694259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83cdf2faa5bb3671503566ef089a28d28a7ea49e975271f1aef908068dc5f9e. 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/USA2P1694260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eec5e213cd3cdaf405953539adfb32e044b3eac00e8b21abb56b7fd1a86f9b. 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/USA2P1694264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caceb5635239578dab5ba2dd3b482586cf61964b61da1d56f666fb5301e724f. 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/USA2P1694266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2b12e0c45e1fb86f4442354bdb8b24b92444901dacc212e57c0ab930f8940. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2P1694262.
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 0xa925a8e2a8ad0f6d084c9b0b46235ff0420cbeb629a6920796ad1ca5130f1564. 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/USA2P2021385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e8d0b4dc64024f85941b6a68699d180b5c340e4e6aca79600479e6d864e48d. 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/USA2P2021390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c350fce80fb840314bccb64ba7301b0804611cf99d29028f1024261f9a6fc34. 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/USA2P2021391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46132c9d6b309c5f185e5746c58ce57bfb8c34fa1f2621d2a2a353bd63aee656. 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/DEZN82363607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28d32aa477cc6b5b020b74670b45ff481b3c88df6679edfeba0ff3767e77cb. 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/DEZN82363608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96acd7beaf9adb1a36710a0d11914e9750e1639d3b7107b265ced577ac7e49b4. 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/CA5KR1949030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4cdb49c7ad119b597f9cea7eb92442ada8626002b8f5b0ca64715486b66f7. 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/CA5KR1949021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1721e5c87dc64f77d6e23b9456c67cbaebf434930c2847dce163c7b46d74b6. 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/CA5KR1949047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b33294b6b432ed3c61401a621a3c1522da447adba8579a6f650d43ede9c96b1. 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/CA5KR1949042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5078283d14fb844139858299dfb0eec1d390c007fdaa519dc400686439491031. 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/CA5KR1949044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa11fc15658d3bcb8045e81a875a9b16ca1d78c5fdd0bedeceb7f7884ba305a. 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/GBLV61717432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da3874ea415e86694a8e9df06c8eb4370a95523477db8b50dc64d22004a9d19. 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/GBLV61717434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd622fac18ef8efb73762f30c917e4fb2c3e0c15a5a7ee6e42b429dbcf24f467. 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/GBLV61717433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ada8513d928306f58ba4373d4e3dddfa15fa3580cdca59d98b58cdb356baba7. 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/CA5KR1559500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370ca6da35a4264ac15dbf8e2033fd3204ee5ca5b4f443fe52170104a111f6ed. 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/USQY51789230.