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 0xf08912c5569d9dba6f29773470954e903de4dd2d90426244bb35a962e2af34a9. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51e3df22-0489-4a03-b722-47216707f1af.json and https://artists.proofprofile.net/proofs/artist/51e3df22-0489-4a03-b722-47216707f1af.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 0x7d33634342bd4cc3da655eeb63a37936dff9f978b53af55d13d2e176d2e3ca85. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAS2339261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c371297a52391bc8a2dfdeed9c348d719c22c37ab466be2f414639c3af22ec5. 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/QZES62250981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf5873b25b3675fc6e5a90af16e6df998e528d7a710a33ec5d9590f53c147d. 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/QZZ8B2412643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78d917d03a85a39c68b86386acabafa318a14e9b64021a3530e02a879020ef0. 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/QZZ8A2474192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a06fa9a8ac6028546e0628507da47f0498b34b14f683890d1489a95523146. 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/QZZ8B2412594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60932e2cca272a88458bc06d4bb39a347281d95b41dcad3690d0dda0e330dfd. 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/QZZ8B2412595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1056ebcde898dcef9d9bd52687313de970664fa8efdf854c1f42edcdb517745d. 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/QZZ8B2412650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a74f890e21f8b71a2b044af57067a2ef7451625e9cd35d928534c0c7b690921. 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/QZZ8B2412608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394acc1c9f4ef8fd8a8293cfb09bcdcaa32d05370648b886715e65309200e21b. 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/QZZ8B2412622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a3008dde530ce6493145e579c582bcbb37757d5dc9500a286b5565aeb5f69. 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/QZZ8B2412636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb447b9e2bd31be0cf01b4b2ee035bb3c4c04c5340ed31caaf4c826fff292dd4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZZ8B2412601.
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 0x43776ebac4a9a972a0016f66e87fc3eb17050987957701006f03062f71fbbd0c. 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/QZ5FN2564927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dfcd81ae1acf2bbf64276df3092e9953f13fd44789d1c1f0bf7a99606e8f13. 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/QZFZ62525002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd71402d1a26134ddaab1f532912622f18ebfe0e7eb81a3b158bbd1187596764. 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/QT3F22476066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf016a7619b6c66e5e9c822a3779cc09b4b8cb522fbc23408befb2af23718b6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3F22476063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c00ca785d4b1c48429ef1100159ed5aad01fa8bc3e3db4ecb80e4081edf8d. 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/QT3F22476064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdadcc67c8566ed22b6dee181d756cfda3af5186cbf1e9c7047eacb26145e8c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QT3F22476065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5a944da0445251188501efd05f1d66c0858f68ba5be6cd6d112b44657d6876. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QT3F22476067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36befad5b50670ec85211f669f36af7adf3a9b0a4d74495ced6b0e74990ddfc5. 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/QZWFG2389336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cca5afd47a64a50fb93a2f1fe3a69ecdb5a3a73022306b092f587e3d5afbff3. 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/QZWFG2389339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8ebc490f56ca46c934edce97efe88e91595bf8c621cacaf7db85f383d1b40a. 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/QZWFG2389342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7fec0d0bb9689296edadfada65855871aebb015fec45c4cd4705830cefb60c. 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/QZWFG2389344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8179603d9a8ad89223f5be7f0fd4f7b32fe7469d8a9ae4504a55cbdf4f6d61d7. 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/QZWFG2389346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535098fc5fe938903a52c4a9d87c50179eea5907f68e231a3333b1ce8f8d3a69. 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/QZWFG2389349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330a0aa4526a8f3affb60e02c1f1b6f91ff9cf1d236b2a140df95e506c103a14. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZWFG2389338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cafbd122812f765847581379bd9e7e8309f6f977b7d130a30961694897a90a1. 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/QZNWS2433936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ec234e581102741b2df99bf045377e38986bebae8d82c16f8bbe6b4595c4ff. 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/QZES52442171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aff0626cc88e08769568cbcb60a93afaf74bcadd0360b3db23678545600f61. 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/QZES52442172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb4781cbd14fe822745fef6f577868f40640dd7225a82dfe3a64de24bf3d0f. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZES52442173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a650735db0898e8c5f7b76287065c2b4f879a3f8fb050db0243b3cf5566731. 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/BC6M22410883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871476d1d0f84ffeda9792b6e094a114c8acb733892c506d27cef25164cac74e. 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/BXIV82401778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6de1586264ec339c916968100954fee61be3f0df9a0c53fb017767ad5ab542e. 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/QZZ7W2588827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcb793c10a883758857c8fef00c2fb250d86e0f593957dc9ce0c993acec076d. 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/QZZ7W2588828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258dd07053c65886ce3f82d42d6fb81bf39d35a45abbd8720389c80d4012577. 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/QZZ7W2588829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067bf86978f752f239e9405db53461a9a025d6bbb2924c20f64c9a09359154db. 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/QZZ7W2588830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5119d98a977de6336a095e4a9e6d695b3e581ba3ea3c00d65c0c5c90408c90d. 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/QZZ7W2588831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ab3c0fa5679521849b5074664bda50824394ce97b7afa01b63d69829b7707. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:37Z), 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/QZZ7W2588832.