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 0x66994fe792fafc576304248ba126772eabb51c5b7fdae477861f7d0ee9bb92e2. 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/bf6d4305-5d6d-49cd-bd2c-e9aef470c315.json and https://artists.proofprofile.net/proofs/artist/bf6d4305-5d6d-49cd-bd2c-e9aef470c315.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 0x068ffa0ae884199fe7db9db53449eb1038fe068dd289f2e5a47ae56bbdd5a120. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNA2595438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f597c9300116eadfea12587068d2098fae256d7ba2917a8a30f12f16a7aa0f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2576742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5810dd947e32a16143ebf7c97e5db21410bb59097bd26db4b2d9b594b1193cd. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNB2576706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33150ecaf638624cac8f01f94bc441bfe70f43124f86cc709ece35596576a5f. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZHNB2576721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7ebf5848a2a1280278f39105b8e47eb2bdb59a74c2aafc0defe1e928df0a9a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:21:04Z), 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/QZHNC2559985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ac2f8312a0abd774a011e831703d0d941a07270fc4f4932099daf9afe4f14. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZHNC2559986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b37a513c02d098aebe89c765b3a5d6d4eb629b07dedca08a284bdaee6ce8764. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZHNC2559984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e4fb1103d7aaaf95b9113f1f581815043195ba14a0d0799bf437dc4bdc2c7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6Q2536141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3aae4b8e937c0b51b48d56c4c4f05a8b15faf858b89ae7373804ba7e34b88c. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:21:00Z), 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/QZK6Q2536144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db4f45b0025d5cafcf4afd0a85760678314ac41bacff4b052b34b020e17ea7b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:20:24Z), 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/QZK6Q2536140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd315b32992b8c62e45d9fbc848d540dd20ff223d19dfba204ab5756cdf615ad. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6Q2536142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896ed7ee2243e6677e7d2cb3b95396a15a103d58f22e4ccdebc9d66b797b2007. 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/QZK6P2556562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf03b9913cdd0900276375d2c419eedc2ec99f9183729c0394884ebaffa31aa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6P2556577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1826d3784be179b1c4382760f1615db278ff9d5b6b28e4d7b1bcbaef2f60bbc1. 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/QZK6P2555037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8b0fdfe843d3d646a6529d4e79a6977eee8f19aa547aa40d38030ad0d01afc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6P2556578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027be3461a792229e6e3edafacbce456d09ef7503d2d643d9b7abf89bdcbeab. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6P2556561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62257516aad3590f77ea1769535fd898f35b55b3cad7949ee11ba82f3238770c. 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/QZK6N2534254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816d6ba42ab7a8a38500ea3f220eca692a64a50602a5c2ede6f4294a1adbe57b. 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/QZK6N2533092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd26ecad276f985593c2df89921125b3d313da5ef07d506f38bb6d169392dc2. 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/QZK6N2534250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c27a11373b719efa59fd0020f62ebf116c8df90ba3c1d5a3149287b1e64fef6. 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/QZK6N2534246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f151f50645d629da030d9703e8ed551b5a0ab9bce9ad743dca8058b2d52177. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:16Z), 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/QZK6N2534245.