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 0x5b2347fdb300d3e5cc0733256f14f5ea1af7615a2d4bc8a51024176799952c11. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46a42044-1282-42a7-b1c7-7d0506a58b65.json and https://artists.proofprofile.net/proofs/artist/46a42044-1282-42a7-b1c7-7d0506a58b65.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 0xda1298183b3a5b107d0e329754ba191c9eb9920c18270f23b2c38857260b8bcf. 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/CZUM72400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8e4db097b0aecd0344d1210d80f5be827d945abee56ced2003853005f62e85. 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/CZA232001138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a4a74d718a2a96abbcaf1a1b296b7317cbf4c3ba7a744ed3a188899d1ba75a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CZA232001139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd246b5a8c7a6289e31cce544de72953d3239dc1ccf7f9d2a7aa38a1bc0d72885. 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/CZA232001140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e596b4f48d446f35ec89a3147a322c420c026aa2950f97cd5c553a9b9ea345b. 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/CZA232001142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82f203f09c6773254cb51ca899efdb43f63d3dee656886758ca0a43c1047b25. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CZA232001144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb770ece347065e9d468ede9a54f1a7f33b40085c9a9be47cfbc6382bdfbcaa38. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CZA232001145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8260f0b11515f5a2bba9f2ea16d1661e6f64aaebeb77a2ddc0b5a022615e09b8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/CZA232001147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df5c9c45639bc4ab41114ad672099edd3a5849465f02d2bfe5d59fce733e729. 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/CZA232001148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447e8d9e446c5b4365b9fb229f09fb96cae51429b1a50a06227e2a909962d951. 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/CZA232001022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189e14167b6eaa3ef80f4a9e2a898bcaeddad1894b62238a863a3adda77989b3. 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/CZA232001021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2760a00140327ef40af7c2ab21cc70c9e16bce7773a1d3be014c37004fa411da. 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/CZA232001150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1031df439b7a672a8cbfbd104a8d07a6792cd2610fd07bf0f0a09b9b19fc017a. 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/CZA232001151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf3163b6a5086b4a6d9d1509d99ac3543e66fbfb372970dd569c91e52868fc. 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/CZA232001152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eade2df6bf974f7d9c17e7340ff46cfb096057fa584e015d83bf1608947097. 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/CZA232001154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25c94e7d21a774601f89fbf43603239b67a260c026915442d0a29f8103317a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:16Z), 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/CZA232001141.
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 0x4944fc2ca55f653ffebda1aa3477db4679ffd8725a15703b5622442a67431439. 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/CZA232001143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5c395b042951ca2b5a0d443b321784998c73793377a751e7519e051b5f8cae. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CZA232001146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341443224969bb7621e81e0bb49580076bddd7b70876d6d6478178b632f1ffa5. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CZA232001149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecae63005d2815d4bc49cefd19714b86f5f6b23b680fec1e05572fc49f4cb1b8. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CZA232001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c0b7a134eb56b574b7c8127fb936e77730f4207fe02f7c5e6916d66e65c24. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CZA232001153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6b505869cf38f713402662cfcd20ab4427715df1c3ce8cc0fbf71aac0a018. 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/QZN882166274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879b581c4a40a32e1e6f078ef0e375a9a45fad673ba86d5eb5d5bd3980e65672. 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/CZUM72100749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ba22063f7d52890e54e1459c465162fd4f91e2d3c937bde905d0cf57f310a3. 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/CZUM72100751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb633f775df32b8ec97c34ebd6ce4a5d5f016796a6feac8b7e8c5d0a40e77a980. 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/CZUM72300667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60aae582409ec798d891efaabb9ec4a23dd1538d30aad8717449db1d249ae3d. 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/CZUM72300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c77b6ba9fd56080ffaafb721c59d9ae1e0088124dc5ebf207aa85f8f19ba2be. 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/QZYFZ2363166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28630e463827d0936a807e26b86f8914e4fd2d12dfe55307b501e678fc6d73f. 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/QZWDW2223326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437b0ffaf79b812d17eeafa62daaefed4a7dc0968c851f318064cba435719741. 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/QZN882149050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002dd7af9ee9c53c103050a4f96a5063df05fad81d484f78ae103fa07a1dbcb. 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/SKA012300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588381ad99b43ccfe155aed5a8860dc4eec7fc48b589f457a9af8b4625fee028. 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/CZA232200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58a9bd06de66691d56719a1b9013b68873d87f8eab774cf966cbcb597f7533c. 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/CZA232000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81170397ef38bb99bb3355cf771b9147ab6fee40df43f9cc277ce029133a84b. 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/QZWDW2331104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda350adb61c12744df9d356922e2e58621af9b7982b1130163cd002136262d16. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:35Z), 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/CZUM72100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b0a44d9fbed1f87903cedd990942b397d347695dabaee3d70deef51b38155f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CZUM72200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610cdba6d9516b69cfef3f27b7a287209ff0c3f7d807b9ca44a81faff4783975. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SKA012300342.