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 0x880aa4cda2af22bc8814102ec8e16c2f704d1a8a0120a2649df62c6e4c496e59. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad917c11-1dcf-42a8-bb6a-4fe4c00d1e79.json and https://artists.proofprofile.net/proofs/artist/ad917c11-1dcf-42a8-bb6a-4fe4c00d1e79.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 0x4ff8ab7b4db95b3f46e2b35f99ea4e0270d940884a17a70cca14b42cfc88a0d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TWB839232802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcff684a5a49f15a5feab528fec3d7e28112f2cda1e2bbbeb9671c0b730390c. 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/TWB839444802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51ea0f8cb16c2eef8d1e48495554ace1303a99ef518eec4a9d5c6003463207b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:28Z), 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/TWB839444811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027f50f055fadbfed9e5ce9aada4f03a277f064dbca054ca2875cbc46b8897ef. 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/TWB839548301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249af352dfb556669f5dce82c464a312780fc0a684a97622d26c936bb7b71b48. 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/TWB839548304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d422ac977dae32df4761ed417408871b732a8b003e3dbd7d07e522db13f449. 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/TWB839548306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3696e1c16fb257856c3beb4d6006fc28c8f5ae41780d9ac351ea1c615625bbd. 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/TWB839548309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcb602bb73f448d63ab98d7d436e8bcdc60d6ae8bac450f00e2ad2ceeb8dfd4. 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/TWA459649702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a45b4cfdbb1f868106f00314cece4961ee6619e1a2fed340d089efd1857402a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TWB830067708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249af352dfb556669f5dce82c464a312780fc0a684a97622d26c936bb7b71b48. 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/TWB839548304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7ec6f9eca15e17125dbbf9ec66be17b9b6395c3977ec5062f4e8252871e75. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TWB831295311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a28aaacc2b4a40b6760cfa00f19c82ee09a1858f86c7b9d1da6c087eafd198. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TWB832415605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025ff14de2e58f5197ac3fda9c00b4a6d2136867cc4150e97037e530c864616. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWB832415607.
台客頌/鼓聲若響/愛的初體驗/向前走/樹枝孤鳥/外好汝甘知/電火柱仔
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce16e26aa6c9650ef2f4a63764f52d4db6cc3362f5d721a9e28acea41e8910dd. 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/TWA450586201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1368e8182a83e5c4ff5feefe62030d64d1ee022142d0ec78d15d8cd5e9f3be3. 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/TWB839444801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688c6ca9279f3568d20fdd76727cb39fa352cdb5c51e215e4f2667e71b826ab. 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/TWB830067701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1368e8182a83e5c4ff5feefe62030d64d1ee022142d0ec78d15d8cd5e9f3be3. 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/TWB839444801.