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 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 0x01ae6abaae36cde15e09f4371e641e5800f0332d59e2632cfd9eb265c0e1ce66. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dbefefb-6a41-4f4b-84b0-701466717491.json and https://artists.proofprofile.net/proofs/artist/7dbefefb-6a41-4f4b-84b0-701466717491.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 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 0x5c57a5268832af4e169ec09da5cbd2903f9d097f68a3058844648fb25c786428. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CNZ501901073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3451188348c76472fdfca7adb603a219c8eef09936ff1ca59ab0a16abfb75d9. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/CNZ501901074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47ad7179391bdaf3f7257b818367015c7f8d438f542106526846b1054e4b57c. 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/CNZ501901071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cdf832aaaa4a1d0e05ef3a3546a12830bcaac7d1f67cbed3a0c0cc5b714a39. 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/CNZ501901079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bceac0e2cbecf18f287de3d5c86c50374a7554bdae4af6745879a5fbe145c7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CNZ501901069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215da5733e3186a9826b7b5d734c9cf21fd964c4841763ac14dbf24dd6834219. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CNZ501901066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9799d515e9c4d3de1c6868db2eaf02100b3a4a3905cb7a75f20509c5d069ba9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKG732137653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7556b8e894dfc74cd506e0b382afc1cb789b291b41143d0ac210b4a83b6f17be. 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/HKG732137654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a2c47f3aa2980d82cbdb2cc3fcf878b9d50f0d7d66744e8f64d6704773ab3f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKG732137657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf8564f1c3f114916952b1cb55ddec5331d08895c196877cfd843792272e881. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKG732128651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a424adb933a63ac699456789beda2e74ef2d253f4bad68a28e92ea8aef0eb01. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/HKG732128652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905f5f746fa2239d8fddf0ed1a0930c30bb7a6f7695987915016008f354da81c. 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/HKG732128654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faddb84e1abd6ff6d995b71539bc5e6d9caad72cdd34e01210404522ce58b4d. 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/HKG732128915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40ecf2dd9a46d89099e6c92d10b78e85988cf873e927b5df6087fe54a8c5f0. 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/HKG732128916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0b02a3dd514a2b0cb9e4aaf0e330721a82ea2fe17f9d51be86f256e13a99c. 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/HKG732128921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6817eb0ac8d47c394120008fdc4f137be1f4cdcc2879e6355f537b9cdea83b76. 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/HKG732128922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4edf34cc3ddb6e1d3788fdeb14224d701c4fcd1f8d841f2f50490993bbbb92. 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/HKG732135000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77c0dab35f93e9bb1472d071a74e7bf40fa8c17303f9f7af1c9a6433f5fc98a. 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/HKG732135001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5f7fbe90027e80c560f31d46f5fb66f135d2ac35eee8a1b4e909f8e46a0b9e. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/TWU712002151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170e3ff9073fb8035578ac2b9c2eb0175307fc87e747b40184db0df5fd90d3b5. 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/TWU712002152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c54a3127543fcab26c15353b2dde32d16ab6a104c1350feef2a8392e32829. 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/TWU712002155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89cccd046952f80e9ec6d90858aa73024256f7943ac3d0d96c4a10a416c8e5a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TWU712002156.
我們曾是少年 (電視劇《誰的青春不叛逆》插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2e5605ed8adca124c12d2d6d56a9d3e2bc6f1e12cc73ef2cf1de02258c106e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CNE221900682.
誰的青春不叛逆 (電視劇《誰的青春不叛逆》同名主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26a76adbb1974d40a66a0a0a528f2f58b562ad8175c585706a31e6571bc44f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CNE221900680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce59ed92ecb49c57a594d775dccbc669a9ab58acfbd5a9c8987f1d78f8ca5b0a. 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/HKG732136064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2b22a5dda2bdaee5431ec3f8a8fe1605e706552b9f32690ead5ffdc20b75f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG732136069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b4bbdccd32ad8a3f35b2e0ce75bf95946d974c8c16271689efb49189190aa9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKG732136073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4de15cfad687bc2fa47722eb0234473cf5676e406f7f04ecbf3819b5f1b0d9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG732136075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3af7e0eaf0d0856ed45f90ce5ee88daa7827797f51e3d7bd39daebce68be1. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKG732330015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890e323ba44f952d99a1a3be7715ab7ad07fad781edfd4a510078251f3ca7ddf. 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/HKG732142626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c30fc1f72d3fe159eb6d2b04221dcec6a5e0e0b44c9317560eff9ff163b4c9. 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/HKG732142628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87005c6b6f2fab99c456b4995dd647811cdd3e0d4a4e468318f11fe709c606ec. 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/HKG732142629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7091a591ab65887fbbb7aa968057d78edebf269fb03840d8b27e1252abd61851. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG732142632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d16c88aa808225ade13c5f6ec84a76956029dc6bc3d9c0718e8cacefd82053. 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/HKG732142633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081996615c8963990a6c1cdb83f0d4462fc2ba568081876943be1886ce9f72d9. 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/HKG732142634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83af35b5d33b088a1f5e9f09650f8cdaf584953ac8dfa19f09a8027d25d92526. 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/HKG732145090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd974e880086670a43b1b1f9a2e715c891a491c78f4f4fb2b36b5efa2d8354bf0. 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/HKG732145091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b74a90fd2c89ac7ea54f9c9297952b74350769280b4483089ac78a6527f56. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKG732145093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f10d80723ab69e98230f41319117585aed7349fd810ce5388ef1f1a360579f. 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/HKG732145094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c9d1a3c2aeee2bfe7945d111d628ad0227922459b3a3055363ede99c53b84e. 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/HKG732145096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495acbaefe21496df8f468b230a4b0c3a6e1755490abcb0bfa839c2e16e6362a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CNE222001540.