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 0x74aae9e461146597e684d3967da97012b345c769410b98ac40ff2dc2082df816. 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/f8b82601-32c2-4f72-988c-b57b9bd4b378.json and https://artists.proofprofile.net/proofs/artist/f8b82601-32c2-4f72-988c-b57b9bd4b378.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 0x436378744c31209b44b6431b25cb01690cf23ea2363a4f946d86b12dd051a212. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN42296825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f89860d12b975ff6af52f8656f94b89b33a646051b19931361945b2668ad3e. 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/QZMER2277388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a284d4386380f4c82c96cdc9e6e11f31bc1e405f94749d614dd586665600dda. 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/QZMER2277390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c8cc65d9f80870d89f94952bb1526a24d925df417f748d6d0bec0bff5dd3c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFZ22299599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ddf343c0a3cc990ee356e2e027cfb84014d5cb32f39541a2af0ab3943d291a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMER2277391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf496f1479024d82ee59177a15a62d990e3c30236a916f11f2ca95f08d7a282ad. 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/QZMER2277392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9a5e6e9996fbf30fa5d12079dd131dda3ba7b0eb2f4881182ca525804fb37. 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/QZHN82298907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8388d629c0041ae45df5c510bc84132a88a94622fff802d0f3a885dcf6fc674. 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/QZMER2277393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1923d7d9cac0da976520af8a01218de906e60505446a0b05f6d7b419d891be0a. 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/QZMER2277394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436378744c31209b44b6431b25cb01690cf23ea2363a4f946d86b12dd051a212. 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/QZHN42296825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc12af5707f3c5811776e917cf61060611df294944d09dbb9b065611d56f9f. 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/QZMER2277395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14371cf325eb779b601a80ab5c639b902e42ee85115cab2b52aaa4747abc4b09. 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/QZMER2277396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94998a11b17dd1aef28cc525862ed465361820cac3114c13e7041573fa53d464. 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/QZMER2277397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16567ecd2b2cd376c3510773164c628e9bcb55caab611da14d8e4d9821fe095. 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/QZHNB2207958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c8156492864800c884843b8a646304156bdc30afb0657b60e121cf28232b3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZES92398302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952e699126237a7e85489b5f9ea0146a67fc2ddc3ea08f945d0305254d5d1622. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42407103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9149d4b3ddf0e1c6816d107a5e1b2f70e1cbedbbea6fbd74f2a55064f52f67c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:59Z), 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/QZNWV2409533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd6e9332a22ab16fb413434109327dd4771c13cb2e8d738f7ba676c33fe225e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:57Z), 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/QZTBC2403624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ed3770731420181aeb10a7395f9cbe58218f5fa481b71399218747678ce86. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7M2445018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ad6889089798ca934a0bf494037a790e4cab11a9db49605bfda3b99b7ace4. 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/QZZ7M2445019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b5e10d2a97f1cba9f5ea8b57c12f9ff2cef9ee0394832617a9b427319230ac. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFU2489581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212d008715a46d12198226245ec86426866a3dd82d2af41f72828da0e0c2c2e. 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/QZK6L2443667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3d13242a6fda4dd3c71afce3dbee02bf8b3c10e0de0f69ff268ae7e94cbe44. 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/QZZ7M2445020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc02ca32ab171c587077077560462a1c008aa1c5e0231e61d97ee6acf90bf35. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:31:00Z), 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/QZZ7M2445023.