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 0x4797aceb1821d8a9b84f3ec5a3074ead89e60c27d29ea7c7e7b864860c2b11e5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9df2183f-751d-4d59-bb3a-3afa481434f2.json and https://artists.proofprofile.net/proofs/artist/9df2183f-751d-4d59-bb3a-3afa481434f2.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 0x67cff31409878803b99b4c5ef1c9463e721a6612ac2fa390e9cd7e215fbab667. 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/MXB051500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243aa0c1c203fbd42a3a61cef3cb5805f64b812333b14aea7a3785ce362b50a. 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/MXB051500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b484b0f1bd96f19bd5a166ad257b1b6482a43a59f943fe37a5d3609f7ee0371. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/MXB051500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c698e576c3a197e960419471f1e5ff129aeb7ae5b7efc8f6811f4b9841501c6. 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/MXB051500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d2171582c39d67b5b8d3c71b730fbf001dfd6375e4b011b74679b079aa427. 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/MXB051500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f6d26c184f8ca7c55f76ccc457084a9ae4e657e3b236f5b718ac380088df6. 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/MXB051500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0909a0c308e09c5123f8844d3e99b49eecfe243526026be39f9777ee9ef61. 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/MXB051500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd49319d42939b9f9eb138c7cc7a0664668816738159d82b42b49f30db133e1. 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/MXB051500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b168a7356865ba3927d249faa13c2e4347ebfd51c074b21d681e6097f40f30. 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/MXB051500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32886f254225b76d2b5c8a7d4dc38bb8739651b8ba7446d0f89a45c981d811c9. 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/MXB051500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629bc01098770127baef688fe2ce7cf21c3fba6760b5d810c3ac28410ba370f3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLM1932757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0c81a2b3af42b38f164b20e51f93900d37f2a088cf690c10726062a069004d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZGLM2066345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a140252bb3a6fdbd9417c2bdfa0523837157b3d1d8c2193cf579fa7bb9cb90. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6N22249566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1342de98441c4d1eb5ab5e57b095983f7d16a6ccbe0cbc7dc92aa538357e03d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92198675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5160371f696384c9692abbe9d3038d97302daf284f506d708e244e56748384. 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/QMDA72131240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd80e2343dd3268cb87de61b169620c448c04c31944f0f212ed69da53e52220. 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/QM4TW2218978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5160371f696384c9692abbe9d3038d97302daf284f506d708e244e56748384. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMDA72131240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8abf1d28d4c4595615bfd22e8b41dd6ee7507677e2e37a23be5e5232cf84cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TX2224150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7206b966c91acbd8272c6feebde6e9589be591ec5b1883794a19d4f1bade596c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM4TX2224151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9152e7345f37832543f1fe0f18a890cf1989d99a1b6d62f5fe6f6b33a734d2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762162700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16800d99e034122f55d78aed6a8d72e41581ac9695f778ab5133a9f907e02b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ7362000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2776217ed6810378ce3a923c2644ea0fdd82cb145b407bb52b31002391feda3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXF012000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2776217ed6810378ce3a923c2644ea0fdd82cb145b407bb52b31002391feda3. 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/MXF012000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2776217ed6810378ce3a923c2644ea0fdd82cb145b407bb52b31002391feda3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF012000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3006954fc8c6b33175b9a489cc4d32b4f03c3ed5674d679d2718ac4078c4b6c. 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/QZGLM1908842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27d3c0276eef6f369f522f449be6fb57c4defa0ac3152cc64fff40f8ee4c136. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ARCZH2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d88e7ffc405bafd786aa7588f2dcf991d895e52b9dfbe0e50dc147ef62e0e3f. 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/ES5952306904.