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 0x884c71ab91caf881a96a40ae7808b821624e7b66b4b9b7906470727de7ced50f. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1978b68b-d573-405c-bc28-4af0c57bebc5.json and https://artists.proofprofile.net/proofs/artist/1978b68b-d573-405c-bc28-4af0c57bebc5.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 0xa7364680f0a6e6dd6ff946d8affdad414241dbcc73ad006e071a68140d5c47fc. 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/CH6542045966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cbdf69ef6b00c833aac8592091464d4f0b6273e651dd7370d7e15742ba42b8. 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/CH6542045965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f589ddc798aa54cb81e91d85c235ca941565bbcbe23f7ceae55ed11889013. 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/CH6542045963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21e7831ca5f550a4cf87d586a6242693bf953020fbfc86a8df03377502d63a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:49Z), 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/CH6542045937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e66a31bd16bb841258c33370954c5bd7ab44bdfe250c05730289495ea738e2. 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/CH6542045936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b443a84070cc1293c873c6571cb474e7d606247352d44d843c072a329b90d8a. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/CH6542045935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b30431d2320269af2e4c6b6265d773a5f74996f0b7e637d4591d8889e84c14. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CH6542045934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1877ae903c48217326900d347a59acee8430e85f682a81f41877c0120308f477. 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/CH6542045932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb59707ef1fd0efb7fcef9dcdd2e03f3fdf4f5e073162c3d0f650c93685d03e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:12Z), 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/CH6542045964.
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 0xab4b8a4c9b032ca705c74d01eedb4a257fa98d49a05cc15eed23376f8e922e2f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH6542045933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad15236f13f6c90e6a5a334dfc823c86f92469c1f3eb56bad7ebb97c51cedd8. 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/CH6542056413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47cc0baadb7f52663e183838f16aaf342cca77b8ec72da1addd2623830dfea2. 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/CH6542056412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f26e356e5826e1f7f04a327f5a2d275a17a154a8f60f030daca48992eb2fff. 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/CH6542056410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5eb169e309311bd060bd679c2ba8c3ef5919aff492ff3f54c53eeaba1fb012. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CH6542056411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea78949e6c4812a3b2dc3926c7c4782a2498652cdea83c7c4bcc2004a0efb1df. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542056409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98944d267b2b6aefc8ab69027c4d4e8ef1a13bd04ac8641a59e9cfaeb930b948. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH6542056408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a049f1d2320b9a85898faea6473748a466f2275a0c03ac30490f7944bd0f37c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CH6542056403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c7bfe687204c1e0572976ffba1158fcb59c57f79cb7be25ade39df6c2a4123. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CH6542056402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6572406e1bb9ec47ba95adecf2424160d6302a9ca1b2e4c448510c58a5903e8c. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZTBF2484152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8a3866c45f3e360ac38a7efa59f21bf367af79b892f20e6d9a29314e801859. 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/QZTBF2484154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d09f1c922fdf3bf5b4e86444ec16fbdb129f8e29b8e1e7f1cae3557916c200. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZTBF2484153.