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 0x276f6bee905233b73f98815afabb79b97eb5a45e0fc8097cccbea779e3338579. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0298f4e1-0d21-4064-b22d-8459b89088d6.json and https://artists.proofprofile.net/proofs/artist/0298f4e1-0d21-4064-b22d-8459b89088d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Det strålar en stjärna - Göteborgs Gosskör sjunger Jul- och Adventssånger
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 0xc93723be34c29479f944f198cc1cd2493a70d532e90238b6b598bd74335f6f56. 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/QM7281426309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52943b757e098a2c5c9f05d5b55ab4692a0535c6588f5f865d486583c4584d2b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM7281426310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6384ebe43d4c87024f998ddb1f865cf4b7a0bf797583f75da2cb7ba2849a8fa. 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/QM7281426311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf520060a215ec7c9314453c12f7c764e61d44b8ebe75f0a96ffbdff5cdf37cba. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM7281426312.
Gören portarne höga (feat. Olle Persson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82230d99aaf0b375feecdbdb48f4d73e19954098033d2d5986143af524f74b6e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM7281426313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c30dfe77cc012923e4f3f699c8e554b5cdc5182362cddce4d5a2a5082bf722. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM7281426315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f9f84b356f612ce15f0ed72cc567266e1cf96ed3ade659418a071b0c3cfa0d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM7281426316.
Det strålar en stjärna (När det lider mot jul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f330204f0e7d030a15bb9433256f3d219ccbfee2aeb3989b2c780840c5f3b4f. 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/QM7281426317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b22871e2486c0961c1f11271ce48d8323df40c3ec68d27271a28a915255a73. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM7281426318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1101d2963c59bbea384f4c9928ecb809d024dd811479b8d0c182dfab339fa2dc. 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/QM7281426319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd723e8a619eff74929d58829ba98405aaf4f84d1b02d84951d33dcd4152c0dff. 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/QM7281426321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67115b8ec09a3896eae2d3781db9c455fedab7e4d7ca729a2738420390f102c. 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/QM7281426325.
Gläns över sjö och strand (feat. Olle Persson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8f3273311607fe16abaa90015611602131b9d7fe192eac59e5d3016b6757e2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM7281426327.
Med Lust Och Fagring Stor - Sommarens Sanger Och Psalmer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefeab80663224c479e55ca72cf795a50dd7fe175c75f67a3200a1395d1079be. 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/HKI199269301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9603ceb2c035a7db9a1c1f0e33c41f524e72100e21f84dd6fa364fd245feb63. 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/HKI199269302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8648d877d9554abc2714e77ca296a920480a20dceb0855ae91eefa2bc9e26. 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/HKI199269303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d564d0efefb1ad04edf79c04955db39aa702c68d18219e30eddca28d41799. 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/HKI199269304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a23cd968682d8674f58fb9259ad891d23b3ae89d13b566422c26410ff70708. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/HKI199269305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f29c0743f26900c90e2fc9884940405722125d14325573980b5e104006c271. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKI199269306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8814f70d5bc18a63c8e9c0391ec13f83617a0c9cf345f0027603e25920ff8757. 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/HKI199269307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b27f9c70eee9194921bbce27c9adb7cc83627719d923bf9273745de7f734b56. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI199269308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708955d3ead04db32db720875980eefd9ef89e4138d662404b13b439c0752e09. 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/HKI199269309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec545be0adddce6b6490005188585ae371745c8beb39b459a1159b99913abd6. 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/HKI199269310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda979832dcae00ba4b2c22d860f18ac312c7427e28200f6520ff55690a139a0a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/HKI199269311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3499f830290333dc1f23b5b188b5d20181dc47dd85be2fee664d4a73a49bf9. 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/HKI199269312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb299b5bb8484a1fcd46c5cfeb7c26f985c37a547ec6fa466953cea96ea40a148. 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/HKI199269313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dea0dc84caa3ef0cf999d4a8fb6ca0da1cc15dea9bc8d2f87455ba07503196. 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/HKI199269314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deee490ca7f1db3d1ee9e14d02464a73a84dec71403b226df262b4d3ad78e4b. 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/HKI199269315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb50f6d1a33211ea6d631cedcec56c34d150d9b36e4057b22291a105af9120. 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/HKI199269316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23be13658d208aee3dfbe571e2d343d810e13b33b62f58b7760be50df8709f9. 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/HKI199269317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7a9a03d1e171784e85b69764dbfb9157d717eb50da1c3f5b87663f619aaf3e. 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/HKI199269318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa999af53bf1b27dfd1a04800c79a02885c98ca5aa7c6bd834bfd553ac057dc5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKI199269319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4700dd416d6bc08a87dcb6344075deebebdb8612fdf2b04ba8a90923658681cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKI199269320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286bae64289da516e80dbd8d02c374cf0af65b43084914168c7ad4979e40dae8. 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/HKI199269321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bcbc9bfb8ce83d0425c203eb1b3a77d6031973cd8157651720c729b5d9f78. 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/HKI199269322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc3a057205d20112e9ec09e8e32c785431bc0a344c50c32210c585e13b01ada. 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/HKI199269323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaa24c9b98bfc83426c7adf6dc9e6803d6bdcc727a0394b1830e5cfca81948d. 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/HKI199269324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172630115cc1649794bf6355c70ab5833b22212b5733c8b130b5148f74f40e27. 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/HKI199257201.
Lady and the Tramp: Lady och Lufsen (Lady and the Tramp): Bella Notte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6362ad202924eb450d6833b8bb3f77322709ea7f09e4bd74457aa80b953e7ce2. 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/HKI199257204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14763d92854e0b918fc7825cec14022c427b3f385b88332ec07f7c7e3ebd2fbe. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKI199257208.