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 0xd3fc7b63f6678bbef5770d544d4e640501fe094a6391467dc6a39b3d1444ba1a. 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/d8e3a69c-3b8b-4b59-a56b-a14c128cd2e6.json and https://artists.proofprofile.net/proofs/artist/d8e3a69c-3b8b-4b59-a56b-a14c128cd2e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc023fdcb4283ebf5195084da1724cab5210b4ddd9c202015a81370c96fa0d6b1. 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/CZUM71400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab718eab32b5fa51a91059a9de5be453250ea4bbcc613ca15d4850fd31def70c. 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/CZUM71400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95deaa5b96b6af80489f7c9fcc7fb0d3ff48713c76ffa833d8f3cae60027d24c. 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/CZUM71400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e78b08fb44b647569415c24b88d91743d8fa265b52b751c237bbbdb9c84f9. 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/CZUM71400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfcfdcff24ea06568fe53dbf6fdc010c2ec927be4c54adbd632689ea6c206f3. 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/CZA111400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4b7a2150e8808100b22940a7ab08de3ce56d187f106aac79a55f6470175bac. 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/CZUM71400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05527e6a7e95ca72ad22412040154bc69cbf99eefdddd5165a8118f778659ce. 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/CZUM71400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c4b56a1597a45cfda2355434efdb155857086007f7acfd3578ab430f8a5d31. 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/CZUM71400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0055ad3d5e0c2ad18628be123426e282c38dd6cf6c9a5636828b792f4988d. 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/CZUM71400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ab30032594e1ac0e7dd726ff95bf72d843bc2c07f252b6981027e21d14924. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZUM71400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f14802793e95bab83fb348a4dd46353745c5dad08a7672692a16eeaa89ee1c. 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/CZUM71400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732126e336d6f3a6e36092519628709aae29ee97291f75aaadc65a6d6c369bd. 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/CZUM71400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fabc15685b35658b4f6bbbe801232eaf0ad0f0f6cde3432f44bc21beb9715b7. 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/CZUM71400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d54c15f3ff6248c453fa7c78fdc463c62f612304ba69eadeaf3f7a419e5cd1d. 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/CZUM71400276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ce619b159d10faaf770ad43af6c68cee3e3347d311f0b4540126a7668ef98d. 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/CZUM71400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e3d2d659dffbcf3d07560437266ba7a0b49379ee211ae961f993120932f9ed. 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/CZUM71400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f39aafe60d9c48f1e34581ee21ff59683675903e9efbbb75e9e8ee117343c1. 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/CZUM71400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aabfb1915107333c32f2b8eedfc41511161c313f12cd0bf628a62aff5224df. 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/CZUM71400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2bd34af4e210ca754a413357942c1981fd8bd109d0b992d3a3f6ea371ff97a. 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/CZUM71400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040f06a29b90ddf887473598edb41bcf3137b44be018753b9502c13e77f250b. 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/CZUM71400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcb117c8fa6e265fa47ea0e88cbfca0f7fcec5a430366b7df586b0c03ae091a. 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/CZUM71400285.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac2f8bc5e52b0b24d37e2e5ea05af41553337eb13ea284ced63a5e5409bb944. 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/CZUM71400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f833651b989f83449c215f8c2c2ff5a6077e412603052dd241dad531c621c82. 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/CZUM71400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5052d0646f4f57c14930f93cc34fcbb3ae41f7e66988a7b1afbdd64bebabc4b. 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/CZUM71400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf983892d81f087505b93a1b58ba23a1e250dac83f12120cb6dbfa492eac0e. 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/CZUM71400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b153a5f9e1e421bcbaf59ee088bcd95a7dbd0165ee2d5e468637921a8abcf2. 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/CZUM71400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea3630a9ce24c566a582c84e2da6c1bba7131fb49ffedbea73113e2e7c0b8b8. 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/CZUM71400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc911b64f8705da2bbe84402be655a147e18143e75745e292df881dbd0b011. 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/CZUM71400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89259f78cbaff014beb9b208e5c73b8d766cbd31632c2da1bc04c3fcb349242. 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/CZUM71400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe831b606c837bd3c3abe7ebcce244c4ab77deba6615ab31daefc587f62507596. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CZA160405507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8395ddfb8f67d27a021d9c281e0e8498659766a03dd9170c34a71adfca6b99. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CZA160400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e88f1065339e36261f84ea0f6926e3c55a05ffd315e1b4b561f2691330bea4. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CZA166800684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818da82648f70b1ea87fd28699186219d5a3619511f8b5e51f9c639fbdb81162. 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/CZA166800682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af5e960b1c2bd8a183d04a3b2af4abb78699b244ac5290caf90841fe2fd3474. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZA166800680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6c318652034cbc79d0566a9cf3bbcd6c4fd3d5a38658e60ef5bc8740a9a8d9. 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/CZA169000313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6e733c07c09cda84a4e8553084a96c6080288ce042133451fce3a18b33d547. 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/CZA160402749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a30c55047c6b0e6b1cdc12e23a078e17d442989238262867b97c4646a40ce9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CZA160402750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4675d0299f5b50ebc42af3b47276234a9a3aa3e0fa7472fc6d58930f2213f0c8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CZA160403405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f35720d45ffb02eb4dbd932df5913ad911ed7d730b1aea86f7eca134922c11. 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/CZA160800468.