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 0x4d2dbd69c239cfda0b7c374448998ba33f176eadaadc91ec11849096627f19d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2b18757-f43a-463b-9810-7ca71d39e1fd.json and https://artists.proofprofile.net/proofs/artist/f2b18757-f43a-463b-9810-7ca71d39e1fd.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 0x3a662ba72449e8b6aa0968597eebac409b9932a23d0467bbb5af8992a2965fe3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TWCB71616002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e91534692224c6f11c5b1893e1033283f4c0f6f3fd9040d5cfd04ba7c34ced1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TWCB71616007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5ba2f4ad2ec16eab0cab81f0aace3c9a6e3f83489f27c6599667805d097f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWCB71616008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503ff5275f8b5166f4715ce38994bda4e829e7a1c6a626a809583aa79a01bfae. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:12Z), 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/TWCB71616010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b38355fb3747082254ae91eae8193b1280f499d6474e2d76bc37c31ee57eb56. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TWCC31802608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274681b25bfe61a767bf81b3ef4b433bdad36dcbbd3c36bf5a24cdec8db7b812. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/TWCC31802610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf2fb51b80fd81ee60aca7c9811e8e2cc230196db2455fd9bd39ab747051e5c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:08:45Z), 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/TWCC31802638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a06c30b4c013d1f3605901f635675df66d0b5513ed8cb34876f27849c4d50. 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/TWA451907001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebcf6cd1054c92c5e0c71293412afe89d1cd960fe1e3ec8dc5691817020d562. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:18Z), 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/TWA451907006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4cd44d56ae6d2f0d400e984e4a7d8e6b93a701369cf86306c119334a8d134d. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/TWA451907003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bd1beafc03677871ffbd6c51f1d196d19971000055769c4e7a3cf19326f27a. 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/TWA451807009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a06c30b4c013d1f3605901f635675df66d0b5513ed8cb34876f27849c4d50. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWA451907001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7731df0077e66e8bec24c1dd1a7802acf2c224a6200303d6fb3851634a50dbe. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TWA451707007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb106c3f48907f1ec5d3db584797dffcb972d6082514458ec469d4313a6d131e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:52:15Z), 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/TWA451907004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fc60e165b0eb6b39eaee3958a033a0ce7ad0f91e9018ce6f722d7555adcb4. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TWA451907005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebcf6cd1054c92c5e0c71293412afe89d1cd960fe1e3ec8dc5691817020d562. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TWA451907006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a2c215dc72fc387f973f34232b81334959f87e8c0b5fd641a5a3ab3e5b9b6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TWA451807008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f18973cd43042a3fbdbdd6c3b6b30534a61fc5ec08960570103e1a10bb50f. 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/TWA471596006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff66c8ec0e13a28ecb2839103d807ea39f70ef6e3eda066781a10fd387c93ae. 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/TWA471596008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c38a0c7601c2a3b9d806118fa045b26e7eeadc08a0c66cbcf9b742fa8c1a03. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TWA471596009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d639c90f43a2b5ca75cbe9fec5452d3457ed380373d0d88f717a7b2a5604bb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:38Z), 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/TWA471596010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ebf2e4609c882eb3673229721c3c728f6a65f3daaeee6955cb21a3b89ddb9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TWA452100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff1c87aa86baf7b68a57ef7eb4c21efed00146aed26470bfad0631f3be7fb07. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TWA452111402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ce546ff8f368d0d55ed51184ed43f7b0f193e0fa122dfa3da12ca953be081d. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TWA452111401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d77e0c0fc3dd5f84b5035174cc656e7fdb07a573adcaccb87cca084a39fcf07. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:29:53Z), 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/TWA452100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc3c731ced2a9d563b94bba831a219ef5d79173a557e3259bd819aa32c46893. 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/TWA452100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f7dc152a51f54b2907569c8be4c164cada5db1188653651adc308b5a06c14. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TWA452000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4138d7d349dc7e1b646c1daf3617f3b00e8405711f42e084efa62908a52bd492. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/TWA452400125.
你這個小東西 - 電視影集《雙城故事》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d306b567ea5f10fb96257f349b5c490778117b4c3722d753abd9d32dbeb415f. 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/TWCC31803148.
我要的愛不是這樣 - 電視影集《雙城故事》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156861625087c4d4b3db90dc74eb3e801db334c832985bb416e20278813b9c51. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TWCC31803147.
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
Never The Point - Unplugged - 電視影集《雙城故事》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b475a9c53a44124b20c59a9e4ebb74b3bec8d44ad62923e4a806493e0d01c2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWCC31803156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b76d627e012373cede26ffde300c6b2e65c4892b10208edb320fda0ca7d82. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/TWA452100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e715e2b83cbaa8e4016c8caed7d7eaab9f87a194edc5677f46d9bb7f49045a. 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/TWA452100045.