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 0xc3d5c115afdfa4f1522c3b981d0c8afc2905a046aaea71a49bf4482c25db6a56. 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/c7b2d3e9-b5a1-4a91-8328-10a1b81fb03e.json and https://artists.proofprofile.net/proofs/artist/c7b2d3e9-b5a1-4a91-8328-10a1b81fb03e.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 0xb653e664704eac637200298a9f13f810f26e70f6bf2643b9889c64aca304edcd. 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/USL4Q1888261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d464c05f77fd8942c2d055c8d2ea170fb7e6a8f631ff1904666aef4aebde12. 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/USL4Q1888264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3eb64c56e306eace91d99620f1202ec45fab5c732a4d50eec6c9502f21a8b5. 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/USL4Q1888267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aeb73638ee2969f6de3dd870a2d915eb76f7a7719bfa768c96a8fa59856b0b. 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/USL4Q1888268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55208db3b677f9398e58b1e4eecc7523a49c1b96a4f9765a4180d306aed16ab8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN62260538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d18855ca8737ff0cbf5d56b53ab7ee9bab8d6f0004505e6d133eaae76e49896. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZK6M2203248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b6282665fbfebc882e28a8f202f9d89ab8ea27fcc75148e1a91f1032b9bbe7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2203249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d00045db729cdb0e2d1c3d2db0db0c61f647ca723b57b8a4a112a2bf741cc6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6N2295649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a44c58521b97c96bcfedf8863fdb1b580f4573de3b1b48af1114a525ecc7a33. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZK6M2203252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468a7fa601501cc2256ae27a4533c418cfb8cfa660af9161c1e618b02cbca270. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKW3Z2303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596637adff570cc93c2fbd132339b62a4b774bc9a340613582dfa8668f036a13. 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/UKW3Z2400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c05e7a52c8ba4f2474a065de92808378cca53f884d48f12d8892fc06e4a1d. 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/UKW3Z2402633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833aae838560048839766a962e615f0b47049cc3c8a014663fd3751906f8561. 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/UKW3Z2402634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729acf23bad83409c345470275190bf7baff4265faa7df00f14ccbecc69deca. 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/UKW3Z2402635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6a303345293344b84debb78c7239bf4deb9648058fdb147ea106c3ed418a6. 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/UKW3Z2402637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c950f22fa7a29c2fb753f4d78369621f07315c6c1437258059f67668cb63959. 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/UKW3Z2402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596637adff570cc93c2fbd132339b62a4b774bc9a340613582dfa8668f036a13. 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/UKW3Z2400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5f15801431158ca3827e434d251ce1710f9b4811066f1b989696b88355d48. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKW3Z2501935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd425e734ec505f4923687318d80c3ad22e828a2f42f6f9ee36b9aa912480bccf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UKW3Z2501578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83619ce8fc871800d30340246f6f64bc1309a4b28c0c3f6394f16914accbe4e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKW3Z2501938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe78b8285f33217f59e87574afe6122e88c7f739b5e1339b5744f637bbc18b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKW3Z2501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb2cb0278f5586cd960df3407fcd4d478b530745bef1e1aa33c7a1acfedabc5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEMS42506231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f34838dca171b7f3560940c6e2c228e090bd1a3bd903ecb62d051ea5cb0128. 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/QZTB42330961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f34838dca171b7f3560940c6e2c228e090bd1a3bd903ecb62d051ea5cb0128. 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/QZTB42330961.